code: function () {
          var json = ItemGroup.prototype.toJSON.apply(this);
  
          // move ids and stuff from root level to `info` object
          json.info = {
              _postman_id: this.id,
              name: this.name,
              version: this.version,
              schema: SCHEMA_URL
          };
  
          delete json.id;
          delete json.name;
          delete json.version;
  
          if (json.hasOwnProperty('description')) {
              json.info.description = this.description;
              delete json.description;
          }
  
          return json;
      }
docs: Convert the collection to JSON compatible plain object
  
  @returns {Object}