PanelFrameCallback

void
(* PanelFrameCallback) (
  PanelFrame* frame,
  gpointer user_data
)

No description available.

`frame`	`PanelFrame`
	No description available.
	The data is owned by the caller of the function.
`user_data`	`gpointer`
	No description available.
	The argument can be `NULL`.
	The data is owned by the caller of the function.