code: function (key) {
              var property = this.config[key.toLowerCase()];
              if (property && property.event) {
                  return property.value;
              } else {
                  return undefined;
              }
          }
docs: Returns the value of specified property.
  @method getProperty
  @param {String} key The name of the property
  @return {Object}  The value of the specified property