code: public static boolean hasValidContentAdditionParameterDefined(ModelNode operation) {
          for (String s : DeploymentAttributes.MANAGED_CONTENT_ATTRIBUTES.keySet()) {
              if (operation.hasDefined(s)) {
                  return true;
              }
          }
          return false;
      }
docs: Checks to see if a valid deployment parameter has been defined.
  
  @param operation the operation to check.
  
  @return {@code true} of the parameter is valid, otherwise {@code false}.