# AssetImporterEditor > Default editor for all asset importer settings. ## Definition * **Type:** Class * **Namespace:** [UnityEditor.AssetImporters](/engine/6000.7/script-reference/unityeditor/assetimporters.md) * **Assembly:** UnityEditor.CoreModule * **Inherits from:** [Editor](/engine/6000.7/script-reference/unityeditor/editor.md) ```csharp public abstract class AssetImporterEditor : Editor ``` ## Remarks Use the default editor to edit the import settings for assets. You can define a custom import settings editor for a specific asset type. To do this, create a new class that inherits from AssetImporterEditor and uses a CustomEditorAttribute that refers to a [ScriptedImporter](/engine/6000.7/script-reference/unityeditor/assetimporters/scriptedimporter.md). The following example shows how to make a custom ScriptedImporterEditor for a ScriptedImporter with a custom layout. ```csharp using System.IO; using UnityEditor; using UnityEditor.AssetImporters; using UnityEngine; [CustomEditor(typeof(TransformImporter))] [CanEditMultipleObjects] public class TransformImporterEditor : ScriptedImporterEditor { // Stored SerializedProperty to draw in OnInspectorGUI. SerializedProperty m_GenerateChild; public override void OnEnable() { base.OnEnable(); // Once in OnEnable, retrieve the serializedObject property and store it. m_GenerateChild = serializedObject.FindProperty("generateChild"); } public override void OnInspectorGUI() { // Update the serializedObject in case it has been changed outside the Inspector. serializedObject.Update(); // Draw the boolean property. EditorGUILayout.PropertyField(m_GenerateChild); // Apply the changes so Undo/Redo is working serializedObject.ApplyModifiedProperties(); // Call ApplyRevertGUI to show Apply and Revert buttons. ApplyRevertGUI(); } } [ScriptedImporter(0, ".transform")] public class TransformImporter : ScriptedImporter { public bool generateChild; public override void OnImportAsset(AssetImportContext ctx) { GameObject root = ObjectFactory.CreateGameObject(Path.GetFileNameWithoutExtension(ctx.assetPath)); if (generateChild) { GameObject child = ObjectFactory.CreateGameObject("child"); child.transform.SetParent(root.transform); } ctx.AddObjectToAsset("main", root); ctx.SetMainObject(root); } } ``` The following example demonstrates a specific case where the user cannot change settings and the Apply/Revert buttons are hidden with [AssetImporterEditor.needsApplyRevert](/engine/6000.7/script-reference/unityeditor/assetimporters/assetimportereditor/needsapplyrevert.md). ```csharp using System.IO; using UnityEditor; using UnityEditor.AssetImporters; using UnityEngine; [CustomEditor(typeof(EmptinessImporter))] [CanEditMultipleObjects] public class EmptinessImporterEditor : ScriptedImporterEditor { //Let the parent class know that the Apply/Revert mechanism is skipped. protected override bool needsApplyRevert => false; public override void OnInspectorGUI() { // Draw some information EditorGUILayout.HelpBox("Because this Importer doesn't have any settings, the Apply/Revert buttons are hidden.", MessageType.None); } } [ScriptedImporter(0, ".emptiness")] public class EmptinessImporter : ScriptedImporter { public override void OnImportAsset(AssetImportContext ctx) { GameObject root = ObjectFactory.CreateGameObject(Path.GetFileNameWithoutExtension(ctx.assetPath)); ctx.AddObjectToAsset("main", root); ctx.SetMainObject(root); } } ``` The following example shows how to use [AssetImporterEditor.extraDataType](/engine/6000.7/script-reference/unityeditor/assetimporters/assetimportereditor/extradatatype.md) to read or save settings that are part of the imported asset, in the custom AssetImporterEditor. ```csharp using System; using System.IO; using UnityEditor; using UnityEditor.AssetImporters; using UnityEngine; using Object = UnityEngine.Object; [CustomEditor(typeof(BooleanImporter))] [CanEditMultipleObjects] public class BooleanImporterEditor : ScriptedImporterEditor { // Property to show in the custom OnInspectorGUI. SerializedProperty m_BooleanProperty; // override extraDataType to return the type that will be used in the Editor. protected override Type extraDataType => typeof(BooleanClass); // override InitializeExtraDataInstance to set up the data. protected override void InitializeExtraDataInstance(Object extraTarget, int targetIndex) { var boolean = (BooleanClass)extraTarget; // Read the boolean value from the text file and fill the extraTarget object with the data. string fileContent = File.ReadAllText(((AssetImporter)targets[targetIndex]).assetPath); if (!bool.TryParse(fileContent, out boolean.boolean)) { boolean.boolean = false; } } protected override void Apply() { base.Apply(); // After the Importer is applied, rewrite the file with the custom value. for (int i = 0; i < targets.Length; i++) { string path = ((AssetImporter)targets[i]).assetPath; File.WriteAllText(path, ((BooleanClass)extraDataTargets[i]).boolean.ToString()); } } public override void OnEnable() { base.OnEnable(); // In OnEnable, retrieve the extraDataSerializedObject property and store it. m_BooleanProperty = extraDataSerializedObject.FindProperty("boolean"); } public override void OnInspectorGUI() { // Update the extraDataSerializedObject in case it has been changed outside the Inspector. extraDataSerializedObject.Update(); // Draw the boolean property. EditorGUILayout.PropertyField(m_BooleanProperty); // Apply the changes so Undo/Redo is working. extraDataSerializedObject.ApplyModifiedProperties(); // Call ApplyRevertGUI to show Apply and Revert buttons. ApplyRevertGUI(); } } public class BooleanClass : ScriptableObject { public bool boolean; } [ScriptedImporter(0, ".boolean")] public class BooleanImporter : ScriptedImporter { public override void OnImportAsset(AssetImportContext ctx) { string fileContent = File.ReadAllText(ctx.assetPath); var booleanObj = ObjectFactory.CreateInstance(); if (!bool.TryParse(fileContent, out booleanObj.boolean)) { booleanObj.boolean = false; } ctx.AddObjectToAsset("main", booleanObj); ctx.SetMainObject(booleanObj); Debug.Log("Imported Boolean value: " + booleanObj.boolean); } } ``` You can also use ScriptedImporter settings and extraData in the same AssetImporterEditor: ```csharp using UnityEditor; using UnityEditor.AssetImporters; [CustomEditor(typeof(SomeScriptedImporter))] [CanEditMultipleObjects] public class SomeImporterEditor : ScriptedImporterEditor { // ... public override void OnInspectorGUI() { serializedObject.Update(); extraDataSerializedObject.Update(); // Use propertyDrawers and custom GUI for any property from both serializedObject and extraDataSerializedObject. extraDataSerializedObject.ApplyModifiedProperties(); serializedObject.ApplyModifiedProperties(); ApplyRevertGUI(); } } [ScriptedImporter(0, ".someFile")] public class SomeScriptedImporter : ScriptedImporter { public override void OnImportAsset(AssetImportContext ctx) { // ... } } ``` ## Properties | Property | Description | | ---------------------------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | [extraDataSerializedObject](/engine/6000.7/script-reference/unityeditor/assetimporters/assetimportereditor/extradataserializedobject.md) | A [SerializedObject](/engine/6000.7/script-reference/unityeditor/serializedobject.md) that represents the [AssetImporterEditor.extraDataTarget](/engine/6000.7/script-reference/unityeditor/assetimporters/assetimportereditor/extradatatarget.md) or the [AssetImporterEditor.extraDataTargets](/engine/6000.7/script-reference/unityeditor/assetimporters/assetimportereditor/extradatatargets.md) of the [AssetImporterEditor](/engine/6000.7/script-reference/unityeditor/assetimporters/assetimportereditor.md). | | [extraDataTarget](/engine/6000.7/script-reference/unityeditor/assetimporters/assetimportereditor/extradatatarget.md) | The extra data object associated with the [Editor.target](/engine/6000.7/script-reference/unityeditor/editor/target.md). | | [extraDataTargets](/engine/6000.7/script-reference/unityeditor/assetimporters/assetimportereditor/extradatatargets.md) | An array of objects associated with each [Editor.targets](/engine/6000.7/script-reference/unityeditor/editor/targets.md). | | [extraDataType](/engine/6000.7/script-reference/unityeditor/assetimporters/assetimportereditor/extradatatype.md) | Override this property to return a type that inherits from ScriptableObject. This makes the AssetImporterEditor aware of serialized data outside of the Importer, allowing it to handle multi-selection and Apply/Revert button states. | | [needsApplyRevert](/engine/6000.7/script-reference/unityeditor/assetimporters/assetimportereditor/needsapplyrevert.md) | Whether the ApplyRevertGUI method is required to draw in the Inspector. | | [showImportedObject](/engine/6000.7/script-reference/unityeditor/assetimporters/assetimportereditor/showimportedobject.md) | Should imported object be shown as a separate editor? | | [useAssetDrawPreview](/engine/6000.7/script-reference/unityeditor/assetimporters/assetimportereditor/useassetdrawpreview.md) | Determines if the asset preview is handled by the AssetEditor or the Importer DrawPreview | ## Methods | Method | Description | | -------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------- | | [Apply](/engine/6000.7/script-reference/unityeditor/assetimporters/assetimportereditor/apply.md) | Saves any changes from the Editor's control into the asset's import settings object. | | [ApplyButton](/engine/6000.7/script-reference/unityeditor/assetimporters/assetimportereditor/applybutton.md) | Implements the 'Apply' button of the Inspector. | | [ApplyRevertGUI](/engine/6000.7/script-reference/unityeditor/assetimporters/assetimportereditor/applyrevertgui.md) | Adds 'Apply' and 'Revert' buttons to the Editor. | | [AreImporterTargetsValid](/engine/6000.7/script-reference/unityeditor/assetimporters/assetimportereditor/areimportertargetsvalid.md) | Determines whether every inspected importer target still exists. | | [Awake](/engine/6000.7/script-reference/unityeditor/assetimporters/assetimportereditor/awake.md) | This function is called when the Editor script is started. | | [CanApply](/engine/6000.7/script-reference/unityeditor/assetimporters/assetimportereditor/canapply.md) | Determines if the modifications to import settings can be applied. | | [DiscardChanges](/engine/6000.7/script-reference/unityeditor/assetimporters/assetimportereditor/discardchanges.md) | Discards unsaved changes to the contents of the editor. | | [DrawPreview](/engine/6000.7/script-reference/unityeditor/assetimporters/assetimportereditor/drawpreview.md) | The first entry point for Preview Drawing. | | [HasModified](/engine/6000.7/script-reference/unityeditor/assetimporters/assetimportereditor/hasmodified.md) | Determine if the import settings have been modified. | | [InitializeExtraDataInstance](/engine/6000.7/script-reference/unityeditor/assetimporters/assetimportereditor/initializeextradatainstance.md) | This method is called during the initialization process of the Editor, after Awake and before OnEnable. | | [OnApplyRevertGUI](/engine/6000.7/script-reference/unityeditor/assetimporters/assetimportereditor/onapplyrevertgui.md) | Process the 'Apply' and 'Revert' buttons. | | [OnDisable](/engine/6000.7/script-reference/unityeditor/assetimporters/assetimportereditor/ondisable.md) | This function is called when the editor object goes out of scope. | | [OnEnable](/engine/6000.7/script-reference/unityeditor/assetimporters/assetimportereditor/onenable.md) | This function is called when the object is loaded. | | [OnInspectorGUI](/engine/6000.7/script-reference/unityeditor/assetimporters/assetimportereditor/oninspectorgui.md) | Override this method to create your own Inpsector GUI for a ScriptedImporter. | | [RevertButton](/engine/6000.7/script-reference/unityeditor/assetimporters/assetimportereditor/revertbutton.md) | Implements the 'Revert' button of the inspector. | | [SaveChanges](/engine/6000.7/script-reference/unityeditor/assetimporters/assetimportereditor/savechanges.md) | Performs a save action on the contents of the editor. | ## Classes | Class | Description | | -------------------------------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | [AssetImporterEditor.ApplyRevertButtonContainer](/engine/6000.7/script-reference/unityeditor/assetimporters/assetimportereditor/applyrevertbuttoncontainer.md) | Adds the 'Apply' and 'Revert' buttons to the Editor UI. Use this VisualElement in a ScriptedImporterEditor when [AssetImporterEditor.needsApplyRevert](/engine/6000.7/script-reference/unityeditor/assetimporters/assetimportereditor/needsapplyrevert.md) is enabled. This is the UIToolkit equivalent to [AssetImporterEditor.ApplyRevertGUI()](/engine/6000.7/script-reference/unityeditor/assetimporters/assetimportereditor/applyrevertgui.md). | ## Inheritance **Inherited Members:** * [Editor.CreateEditorWithContext(Object\[\], Object, Type)](/engine/6000.7/script-reference/unityeditor/editor/createeditorwithcontext.md) * [Editor.CreateCachedEditorWithContext(Object, Object, Type, Editor)](/engine/6000.7/script-reference/unityeditor/editor/createcachededitorwithcontext.md#createcachededitorwithcontext\(object-object-type-editor\)) * [Editor.CreateCachedEditorWithContext(Object\[\], Object, Type, Editor)](/engine/6000.7/script-reference/unityeditor/editor/createcachededitorwithcontext.md#createcachededitorwithcontext\(object-object-type-editor\)) * [Editor.CreateCachedEditor(Object, Type, Editor)](/engine/6000.7/script-reference/unityeditor/editor/createcachededitor.md#createcachededitor\(object-type-editor\)) * [Editor.CreateCachedEditor(Object\[\], Type, Editor)](/engine/6000.7/script-reference/unityeditor/editor/createcachededitor.md#createcachededitor\(object-type-editor\)) * [Editor.CreateEditor(Object, Type)](/engine/6000.7/script-reference/unityeditor/editor/createeditor.md#createeditor\(object-type\)) * [Editor.CreateEditor(Object\[\], Type)](/engine/6000.7/script-reference/unityeditor/editor/createeditor.md#createeditor\(object-type\)) * [Editor.DrawDefaultInspector()](/engine/6000.7/script-reference/unityeditor/editor/drawdefaultinspector.md) * [Editor.Repaint()](/engine/6000.7/script-reference/unityeditor/editor/repaint.md) * [Editor.CreateInspectorGUI()](/engine/6000.7/script-reference/unityeditor/editor/createinspectorgui.md) * [Editor.RequiresConstantRepaint()](/engine/6000.7/script-reference/unityeditor/editor/requiresconstantrepaint.md) * [Editor.DrawHeader()](/engine/6000.7/script-reference/unityeditor/editor/drawheader.md) * [Editor.ShouldHideOpenButton()](/engine/6000.7/script-reference/unityeditor/editor/shouldhideopenbutton.md) * [Editor.DrawFoldoutInspector(Object, Editor)](/engine/6000.7/script-reference/unityeditor/editor/drawfoldoutinspector.md) * [Editor.HasPreviewGUI()](/engine/6000.7/script-reference/unityeditor/editor/haspreviewgui.md) * [Editor.CreatePreview(VisualElement)](/engine/6000.7/script-reference/unityeditor/editor/createpreview.md) * [Editor.GetPreviewTitle()](/engine/6000.7/script-reference/unityeditor/editor/getpreviewtitle.md) * [Editor.RenderStaticPreview(string, Object\[\], int, int)](/engine/6000.7/script-reference/unityeditor/editor/renderstaticpreview.md) * [Editor.OnPreviewGUI(Rect, GUIStyle)](/engine/6000.7/script-reference/unityeditor/editor/onpreviewgui.md) * [Editor.OnInteractivePreviewGUI(Rect, GUIStyle)](/engine/6000.7/script-reference/unityeditor/editor/oninteractivepreviewgui.md) * [Editor.OnPreviewSettings()](/engine/6000.7/script-reference/unityeditor/editor/onpreviewsettings.md) * [Editor.GetInfoString()](/engine/6000.7/script-reference/unityeditor/editor/getinfostring.md) * [Editor.UseDefaultMargins()](/engine/6000.7/script-reference/unityeditor/editor/usedefaultmargins.md) * [Editor.hasUnsavedChanges](/engine/6000.7/script-reference/unityeditor/editor/hasunsavedchanges.md) * [Editor.saveChangesMessage](/engine/6000.7/script-reference/unityeditor/editor/savechangesmessage.md) * [Editor.target](/engine/6000.7/script-reference/unityeditor/editor/target.md) * [Editor.targets](/engine/6000.7/script-reference/unityeditor/editor/targets.md) * [Editor.serializedObject](/engine/6000.7/script-reference/unityeditor/editor/serializedobject.md) * [Editor.finishedDefaultHeaderGUI](/engine/6000.7/script-reference/unityeditor/editor/finisheddefaultheadergui.md) * [ScriptableObject.CreateInstance(string)](/engine/6000.7/script-reference/unityengine/scriptableobject/createinstance.md#createinstance\(string\)) * [ScriptableObject.CreateInstance(Type)](/engine/6000.7/script-reference/unityengine/scriptableobject/createinstance.md#createinstance\(type\)) * [ScriptableObject.CreateInstance\()](/engine/6000.7/script-reference/unityengine/scriptableobject/createinstance.md) * [Object.GetEntityId()](/engine/6000.7/script-reference/unityengine/object/getentityid.md) * [Object.GetHashCode()](/engine/6000.7/script-reference/unityengine/object/gethashcode.md) * [Object.InstantiateAsync\(T)](/engine/6000.7/script-reference/unityengine/object/instantiateasync.md) * [Object.InstantiateAsync\(T, Transform)](/engine/6000.7/script-reference/unityengine/object/instantiateasync.md) * [Object.InstantiateAsync\(T, Vector3, Quaternion)](/engine/6000.7/script-reference/unityengine/object/instantiateasync.md) * [Object.InstantiateAsync\(T, Transform, Vector3, Quaternion)](/engine/6000.7/script-reference/unityengine/object/instantiateasync.md) * [Object.InstantiateAsync\(T, int)](/engine/6000.7/script-reference/unityengine/object/instantiateasync.md) * [Object.InstantiateAsync\(T, int, Transform)](/engine/6000.7/script-reference/unityengine/object/instantiateasync.md) * [Object.InstantiateAsync\(T, int, Vector3, Quaternion)](/engine/6000.7/script-reference/unityengine/object/instantiateasync.md) * [Object.InstantiateAsync\(T, int, ReadOnlySpan\, ReadOnlySpan\)](/engine/6000.7/script-reference/unityengine/object/instantiateasync.md) * [Object.InstantiateAsync\(T, int, Transform, Vector3, Quaternion)](/engine/6000.7/script-reference/unityengine/object/instantiateasync.md) * [Object.InstantiateAsync\(T, int, Transform, Vector3, Quaternion, CancellationToken)](/engine/6000.7/script-reference/unityengine/object/instantiateasync.md) * [Object.InstantiateAsync\(T, int, Transform, ReadOnlySpan\, ReadOnlySpan\)](/engine/6000.7/script-reference/unityengine/object/instantiateasync.md) * [Object.InstantiateAsync\(T, int, Transform, ReadOnlySpan\, ReadOnlySpan\, CancellationToken)](/engine/6000.7/script-reference/unityengine/object/instantiateasync.md) * [Object.InstantiateAsync\(T, InstantiateParameters, CancellationToken)](/engine/6000.7/script-reference/unityengine/object/instantiateasync.md) * [Object.InstantiateAsync\(T, int, InstantiateParameters, CancellationToken)](/engine/6000.7/script-reference/unityengine/object/instantiateasync.md) * [Object.InstantiateAsync\(T, Vector3, Quaternion, InstantiateParameters, CancellationToken)](/engine/6000.7/script-reference/unityengine/object/instantiateasync.md) * [Object.InstantiateAsync\(T, int, Vector3, Quaternion, InstantiateParameters, CancellationToken)](/engine/6000.7/script-reference/unityengine/object/instantiateasync.md) * [Object.InstantiateAsync\(T, int, ReadOnlySpan\, ReadOnlySpan\, InstantiateParameters, CancellationToken)](/engine/6000.7/script-reference/unityengine/object/instantiateasync.md) * [Object.Instantiate(Object, Vector3, Quaternion)](/engine/6000.7/script-reference/unityengine/object/instantiate.md#instantiate\(object-vector3-quaternion\)) * [Object.Instantiate(Object, Vector3, Quaternion, Transform)](/engine/6000.7/script-reference/unityengine/object/instantiate.md#instantiate\(object-vector3-quaternion-transform\)) * [Object.Instantiate(Object)](/engine/6000.7/script-reference/unityengine/object/instantiate.md#instantiate\(object\)) * [Object.Instantiate(Object, Scene)](/engine/6000.7/script-reference/unityengine/object/instantiate.md#instantiate\(object-scene\)) * [Object.Instantiate\(T, InstantiateParameters)](/engine/6000.7/script-reference/unityengine/object/instantiate.md) * [Object.Instantiate\(T, Vector3, Quaternion, InstantiateParameters)](/engine/6000.7/script-reference/unityengine/object/instantiate.md) * [Object.Instantiate(Object, Transform)](/engine/6000.7/script-reference/unityengine/object/instantiate.md#instantiate\(object-transform\)) * [Object.Instantiate(Object, Transform, bool)](/engine/6000.7/script-reference/unityengine/object/instantiate.md#instantiate\(object-transform-bool\)) * [Object.Instantiate\(T)](/engine/6000.7/script-reference/unityengine/object/instantiate.md) * [Object.Instantiate\(T, Vector3, Quaternion)](/engine/6000.7/script-reference/unityengine/object/instantiate.md) * [Object.Instantiate\(T, Vector3, Quaternion, Transform)](/engine/6000.7/script-reference/unityengine/object/instantiate.md) * [Object.Instantiate\(T, Transform)](/engine/6000.7/script-reference/unityengine/object/instantiate.md) * [Object.Instantiate\(T, Transform, bool)](/engine/6000.7/script-reference/unityengine/object/instantiate.md) * [Object.Destroy(Object, float)](/engine/6000.7/script-reference/unityengine/object/destroy.md) * [Object.DestroyImmediate(Object, bool)](/engine/6000.7/script-reference/unityengine/object/destroyimmediate.md) * [Object.FindObjectsByType(Type)](/engine/6000.7/script-reference/unityengine/object/findobjectsbytype.md#findobjectsbytype\(type\)) * [Object.FindObjectsByType(Type, FindObjectsInactive)](/engine/6000.7/script-reference/unityengine/object/findobjectsbytype.md#findobjectsbytype\(type-findobjectsinactive\)) * [Object.DontDestroyOnLoad(Object)](/engine/6000.7/script-reference/unityengine/object/dontdestroyonload.md) * [Object.FindAnyObjectByType\()](/engine/6000.7/script-reference/unityengine/object/findanyobjectbytype.md#findanyobjectbytypet\(\)) * [Object.FindAnyObjectByType\(FindObjectsInactive)](/engine/6000.7/script-reference/unityengine/object/findanyobjectbytype.md#findanyobjectbytypet\(findobjectsinactive\)) * [Object.FindObjectsByType\()](/engine/6000.7/script-reference/unityengine/object/findobjectsbytype.md#findobjectsbytypet\(\)) * [Object.FindObjectsByType\(FindObjectsInactive)](/engine/6000.7/script-reference/unityengine/object/findobjectsbytype.md#findobjectsbytypet\(findobjectsinactive\)) * [Object.FindAnyObjectByType(Type)](/engine/6000.7/script-reference/unityengine/object/findanyobjectbytype.md#findanyobjectbytype\(type\)) * [Object.FindAnyObjectByType(Type, FindObjectsInactive)](/engine/6000.7/script-reference/unityengine/object/findanyobjectbytype.md#findanyobjectbytype\(type-findobjectsinactive\)) * [Object.ToString()](/engine/6000.7/script-reference/unityengine/object/tostring.md) * [Object.name](/engine/6000.7/script-reference/unityengine/object/name.md) * [Object.hideFlags](/engine/6000.7/script-reference/unityengine/object/hideflags.md) ### Operators | Operator | Description | | ---------------------------------------------------------------------------------- | ----------------------------------------------------------------------- | | [operator ==](/engine/6000.7/script-reference/unityengine/object/op-equality.md) | Compares two object references to see if they refer to the same object. | | [bool](/engine/6000.7/script-reference/unityengine/object/op-implicit.md) | Determines whether the object exists. | | [operator !=](/engine/6000.7/script-reference/unityengine/object/op-inequality.md) | Compares if two objects refer to a different object. |