gtk/tree_view.go
func (v *TreeView) SetHeadersClickable(show bool) {
	C.gtk_tree_view_set_headers_clickable(v.native(), gbool(show))
}
func (v *TreeView) SetHeadersClickable(show bool) {
	C.gtk_tree_view_set_headers_clickable(v.native(), gbool(show))
}
// SetHeadersClickable is a wrapper around gtk_tree_view_set_headers_clickable().