createCallback := db.Callback().Create()

	createCallback.Before("*").Register("plugin_1_fn1", c1)
	createCallback.After("*").Register("plugin_1_fn2", c2)

	if ok, msg := assertCallbacks(createCallback, []string{"c1", "c2"}); !ok {
		t.Errorf("callbacks tests failed, got %v", msg)
	}

	// plugin 2
	createCallback.Before("*").Register("plugin_2_fn1", c3)
	if ok, msg := assertCallbacks(createCallback, []string{"c3", "c1", "c2"}); !ok {