code: public String getAttributeWarning(PathAddress address, ModelNode operation, String... attributes) {
          return getAttributeWarning(address, operation, null, attributes);
      }
docs: Get a warning message for the given operation at the provided address for the passed attributes
  with a default message appended. Intended for use in providing a failure description for an operation
  or an exception message for an {@link org.jboss.as.controller.OperationFailedException}.
  The default appended message is 'Attributes are not understood in the target model version and this resource
  will need to be ignored on the target host.'
  
  @param address    where warning occurred
  @param operation  where which problem occurred
  @param attributes attributes we that have problems about