if (iter->main_callbacks.callback) {
for (i = 0; i < iter->main_callbacks.callback->len; i++) {
cb = &g_array_index(iter->main_callbacks.callback, struct bt_callback, i);
if (iter->main_callbacks.callback) {
for (i = 0; i < iter->main_callbacks.callback->len; i++) {
cb = &g_array_index(iter->main_callbacks.callback, struct bt_callback, i);