gtk/tree_view.go
func (v *TreeView) SetFixedHeightMode(b bool) {
	C.gtk_tree_view_set_fixed_height_mode(v.native(), gbool(b))
}
func (v *TreeView) SetFixedHeightMode(b bool) {
	C.gtk_tree_view_set_fixed_height_mode(v.native(), gbool(b))
}
// SetFixedHeightMode is a wrapper around gtk_tree_view_set_fixed_height_mode().