code: @Override
    public Realm getRealm(String realmName, ApplicationId applicationId) {
      RealmSet rs = this.realmNameToRealmSet.get(realmName);
      return rs == null ? null : rs.getRealm(applicationId);
    }
docs: /*
  (non-Javadoc)
  @see org.jdiameter.client.api.controller.IRealmTable#getRealm(java.lang.String, org.jdiameter.api.ApplicationId)