[AttributeUsage(AttributeTargets.Field)]public sealed class NativeDisableParallelForRestrictionAttribute : Attribute

Usually it's unsafe for multiple jobs to access the same NativeContainer at the same time. This attribute makes it safe to do so, and is a required attribute for [wiki:JobSystemParallelForJobs|parallel jobs]]. A parallel job needs this attribute because you must define how to safely access a native container yourself, and lets you ignore multiple reads and writes to a container.