code: public void assertNone(final String paramName, final ParameterList parameters) throws ValidationException {
          if (parameters.getParameter(paramName) != null) {
              throw new ValidationException(ASSERT_NONE_MESSAGE, new Object[] {paramName});
          }
      }
docs: Ensure a parameter doesn't occur in the specified list.
  @param paramName the name of a parameter
  @param parameters a list of parameters
  @throws ValidationException thrown when the specified property
  is found in the list of properties