private void verifyDomainsIsNotInUse(StringSet domains){
  checkForActiveTenantsUsingDomains(domains);
  checkForVdcRolesUsingDomains(domains);
  checkForTenantRolesUsingDomains(domains);
  checkForUserGroupsUsingDomains(domains);
}

private void verifyDomainsIsNotInUse ( StringSet domains ) { checkForActiveTenantsUsingDomains ( domains ) ; checkForVdcRolesUsingDomains ( domains ) ; checkForTenantRolesUsingDomains ( domains ) ; checkForUserGroupsUsingDomains ( domains ) ; }
check if given domains are in use or not , if any of them is in use , throw exception .
