code: public static ChallengeDeleter deleter(final String pathServiceSid, 
                                             final String pathIdentity, 
                                             final String pathFactorSid, 
                                             final String pathSid) {
          return new ChallengeDeleter(pathServiceSid, pathIdentity, pathFactorSid, pathSid);
      }
docs: Create a ChallengeDeleter to execute delete.
  
  @param pathServiceSid Service Sid.
  @param pathIdentity Unique identity of the Entity
  @param pathFactorSid Factor Sid.
  @param pathSid A string that uniquely identifies this Challenge.
  @return ChallengeDeleter capable of executing the delete