code: private void validate(final CacheResponse response, final String keyword) {
  		if (!response.getMessage().toLowerCase(Locale.US).startsWith(keyword)) {
  			throw new IllegalArgumentException(response.getMessage());
  		}
  	}
docs: Validates that the keyword expected was returned. Otherwise throws an
  exception with the message returned included.
  
  @param response
  is the response to check
  @param keyword
  is the keyword to expected