GtkFlowBoxFilterFunc

gboolean
(* GtkFlowBoxFilterFunc) (
  GtkFlowBoxChild* child,
  gpointer user_data
)

A function that will be called whenever a child changes or is added.

It lets you control if the child should be visible or not.

`child`	`GtkFlowBoxChild`
	A `GtkFlowBoxChild` that may be filtered.
	The data is owned by the caller of the function.
`user_data`	`gpointer`
	User data.
	The argument can be `NULL`.
	The data is owned by the caller of the function.

Returns:	`gboolean`
	`TRUE` if the row should be visible, `FALSE` otherwise.