public static ApplicationId from(String tenant, String application, String instance) {
        return new ApplicationId(TenantName.from(tenant), ApplicationName.from(application), InstanceName.from(instance));
    }
A complete, immutable identification of an application instance.

@author Ulf Lilleengen
@author vegard
@author bratseth
config-provisioning/src/main/java/com/yahoo/config/provision/ApplicationId.java