Function gtk_sys::gtk_box_query_child_packing

pub unsafe extern "C" fn gtk_box_query_child_packing(
    box_: *mut GtkBox, 
    child: *mut GtkWidget, 
    expand: *mut gboolean, 
    fill: *mut gboolean, 
    padding: *mut c_uint, 
    pack_type: *mut GtkPackType
)