gobject_sys

Function g_object_replace_data

Source 
pub unsafe extern "C" fn g_object_replace_data(
    object: *mut GObject,
    key: *const c_char,
    oldval: gpointer,
    newval: gpointer,
    destroy: GDestroyNotify,
    old_destroy: *mut GDestroyNotify,
) -> gboolean