code: function check_if_node_exists(error, result) {
      if(!error && result) {
        callback(new Errors.EEXIST('path name already exists', path));
      } else if(error && !(error instanceof Errors.ENOENT)) {
        callback(error);
      } else {
        context.getObject(parentNode.data, create_node);
      }
    }
docs: Check if the node to be created already exists