private Map<String,String> addRequestedByHeader(Map<String,String> headers){
    if(headers == null){
      headers = new HashMap<String, String>();
    }

    headers.put("X-Requested-By",this.requestedBy);

    return headers;
  }
Provides access to service-specific utilities
@return object with service-specific methods
contrib/views/utils/src/main/java/org/apache/ambari/view/utils/ambari/AmbariApi.java