pub unsafe extern "C" fn gtk_layout_manager_measure(
    manager: *mut GtkLayoutManager,
    widget: *mut GtkWidget,
    orientation: GtkOrientation,
    for_size: c_int,
    minimum: *mut c_int,
    natural: *mut c_int,
    minimum_baseline: *mut c_int,
    natural_baseline: *mut c_int
)