return err
			}

			// Apply the change.
			if err := update(mc); err != nil {
				return err
			}

			// Store the updated MeshConfig back into the config map.
			newYAML, err := injectConfigToYaml(mc)
			if err != nil {
				return err
			}
			cfgMap.Data["config"] = newYAML

			// Write the config map back to the cluster.
			if err := ic.updateConfigMap(c, cfgMap); err != nil {
				return err