@Override
  protected AmbariTProxyConfiguration loadInstance(Collection<AmbariConfigurationEntity> configurationEntities) {
    return new AmbariTProxyConfiguration(toProperties(configurationEntities));
  }
Creates a AmbariTProxyConfiguration from a list of {@link AmbariConfigurationEntity}s.

@param configurationEntities a list of {@link AmbariConfigurationEntity}s
@return a filled in {@link AmbariTProxyConfiguration}
ambari-server/src/main/java/org/apache/ambari/server/security/authentication/tproxy/AmbariTProxyConfigurationProvider.java