public override void OnEnter(UIController controller, ExpressionUI previousUI)
{
_deletionList.Clear();
_parameterList.Clear();
_controller = controller;
_deletionHolder.Display(false);
_toDelete = new Dictionary <IAnimationDefinition, ObjectField>();
_dataRow = controller.Assets.AvatarParameterDataRow;
_messages = controller.Messages;
_deleteButton.clicked += DeleteObjects;
Undo.undoRedoPerformed -= UndoRedoPerformed;
Undo.undoRedoPerformed += UndoRedoPerformed;
BuildLayout(controller.ExpressionInfo);
ErrorValidate(controller.ExpressionInfo);
}
