Function vips_sys::g_datalist_id_replace_data

pub unsafe extern "C" fn g_datalist_id_replace_data(
    datalist: *mut *mut GData, 
    key_id: GQuark, 
    oldval: gpointer, 
    newval: gpointer, 
    destroy: GDestroyNotify, 
    old_destroy: *mut GDestroyNotify
) -> gboolean