EditorOnlyModeConfigUtility class

public const string SERIALIZATION_DISABLED_ERROR_TEXT = "ERROR: EDITOR ONLY MODE ENABLED\n\nOdin is currently in editor only mode, meaning the serialization system is disabled in builds. This class is specially serialized by Odin - if you try to compile with this class in your project, you *will* get compiler errors. Either disable editor only mode in Tools -> Odin Inspector -> Preferences -> Editor Only Mode, or make sure that this type does not inherit from a type that is serialized by Odin."

public static bool IsSerializationEnabled { get; }

public static void InternalOnInspectorGUI(Object obj)