code: public boolean isPhoneNumberInBlackList(final String phoneNumber) {
  		logger.info("Receive request for isPhoneNumberInBlackList : " + phoneNumber);
  		boolean retVal = daoService.isPhoneNumberInBlackList(phoneNumber);
  		logger.info("Response for getListPhoneNumbersInBlackList request : " 
  				 + phoneNumber + " is : " + retVal);		
  		return retVal;
  	}
docs: Test if a phone number is already in the black list.
  @param phoneNumber
  @return return true if the phone number is in the bl, false otherwise