UnityEditor.ExposablePopupMenu.SelectionChanged C# (CSharp) Method

        private void SelectionChanged(ItemData item)
        {
            if (this.m_SelectionChangedCallback != null)
            {
                this.m_SelectionChangedCallback(item);
            }
            else
            {
                Debug.LogError("Callback is null");
            }
        }

 private static void SelectionCallback(object userData)
 {
     ExposablePopupMenu.ItemData item = (ExposablePopupMenu.ItemData)userData;
     m_Caller.SelectionChanged(item);
     m_Caller = null;
     m_Data   = null;
 }