public KerberosConfigurationDescriptor getConfiguration(String name) {
    return ((name == null) || (configurations == null)) ? null : configurations.get(name);
  }
Returns the requested KerberosConfigurationDescriptor

@param name a String declaring the name of the descriptor to retrieve
@return the requested KerberosConfigurationDescriptor or null if not found
ambari-server/src/main/java/org/apache/ambari/server/state/kerberos/AbstractKerberosDescriptorContainer.java