static void OverrideFull(GLib.GType gtype, FullNativeDelegate callback)
 {
     unsafe {
         IntPtr *raw_ptr = (IntPtr *)(((long)gtype.GetClassPtr()) + (long)class_abi.GetFieldOffset("full"));
         *raw_ptr = Marshal.GetFunctionPointerForDelegate((Delegate)callback);
     }
 }
        private void InternalFull()
        {
            FullNativeDelegate unmanaged = null;

            unsafe {
                IntPtr *raw_ptr = (IntPtr *)(((long)this.LookupGType().GetThresholdType().GetClassPtr()) + (long)class_abi.GetFieldOffset("full"));
                unmanaged = (FullNativeDelegate)Marshal.GetDelegateForFunctionPointer(*raw_ptr, typeof(FullNativeDelegate));
            }
            if (unmanaged == null)
            {
                return;
            }

            unmanaged(this.Handle);
        }