Editor.CreateEditorWithContext

マニュアルに切り替える
public static Editor CreateEditorWithContext (Object[] targetObjects, Object context, Type editorType= null);

説明

Make a custom editor for targetObject or targetObjects with a context object.

This method is identical to CreateEditor except that the SerializedObject will be created using the context object passed as parameter. This context object will be used to store and retrieve the value for ExposedReference types declared on the SerializedObject.