docs: public AstNode node( String name,
                           AstNode parent,
                           String type ) {
          CheckArg.isNotNull(name, "name");
          CheckArg.isNotNull(parent, "parent");
          CheckArg.isNotNull(type, "type");
  
          AstNode node = new AstNode(parent, name);
          node.setProperty(JCR_MIXIN_TYPES, type);
          node.setProperty(JCR_PRIMARY_TYPE, NT_UNSTRUCTURED);
          return node;
      }