code: public boolean isAllowed(final ModelNode operationObject) {
          if(alternatives != null) {
              for(final String alternative : alternatives) {
                  if(operationObject.hasDefined(alternative)) {
                      return false;
                  }
              }
          }
          return true;
      }
docs: Inverse of {@link #hasAlternative(org.jboss.dmr.ModelNode)}.
  
  @param operationObject an object {@code ModelNode} whose keys are attribute names.
  
  @return {@code true} if {@code operationObject} has no defined values for attributes configured as our alternatives