code: public ModelNode createNewVaultRequest(String className) {
          String dmrTemplate = "" //
              + "{" //
              + "\"code\" => \"%s\""
              + "}";
  
          String dmr = String.format(dmrTemplate, className);
  
          Address addr = Address.root().add(CORE_SERVICE, VAULT);
          final ModelNode request = ModelNode.fromString(dmr);
          request.get(OPERATION).set(ADD);
          request.get(ADDRESS).set(addr.getAddressNode());
  
          return request;
      }
docs: Returns a ModelNode that can be used to create the vault.
  Callers are free to tweak the queue request that is returned,
  if they so choose, before asking the client to execute the request.
  
  @param className class name for the custom vault
  
  @return the request that can be used to create the vault