code: function (content) {
        var fileContent = self._readFileSync();
  
        fileContent.instances = fileContent.instances || {};
        fileContent.instances[this._id] = _.assign(fileContent.instances[this._id] || {}, content);
        self._writeFileSync(fileContent);
      }
docs: Set values to the instance settings
  
  @param {Object} content The values to set