code: public static VariableFetcher fetcher(final String pathServiceSid, 
                                            final String pathEnvironmentSid, 
                                            final String pathSid) {
          return new VariableFetcher(pathServiceSid, pathEnvironmentSid, pathSid);
      }
docs: Create a VariableFetcher to execute fetch.
  
  @param pathServiceSid The service_sid
  @param pathEnvironmentSid The environment_sid
  @param pathSid The sid
  @return VariableFetcher capable of executing the fetch