Controls if the physics 64-bit layers are used based upon _physicsLayerNames or if not, the standard 32-bit layers based upon LayerMask. If a PhysicsCoreSettings2D asset is assigned then the physics layers ( _physicsLayerNames ) will be used if _usePhysicsLayers is also active. If no PhysicsCoreSettings2D asset is assigned then the global layers (See LayerMask ) will be used.

public bool usePhysicsLayers { get; set; }