code: public static UserBindingFetcher fetcher(final String pathServiceSid, 
                                               final String pathUserSid, 
                                               final String pathSid) {
          return new UserBindingFetcher(pathServiceSid, pathUserSid, pathSid);
      }
docs: Create a UserBindingFetcher to execute fetch.
  
  @param pathServiceSid The SID of the Service to fetch the resource from
  @param pathUserSid The SID of the User for the binding
  @param pathSid The unique string that identifies the resource
  @return UserBindingFetcher capable of executing the fetch