pub unsafe extern "C" fn gdk_pixbuf_save_to_bufferv( pixbuf: *mut GdkPixbuf, buffer: *mut *mut u8, buffer_size: *mut size_t, type_: *const c_char, option_keys: *mut *mut c_char, option_values: *mut *mut c_char, error: *mut *mut GError) -> gboolean