code: function( id, callback ) {
      var self = this
      return this.client._clientRequest({
        url: '/alerts/rest/v1/json/get/' + id,
      }, function( error, data ) {
        callback.call( self.client, error, data )
      })
    }
docs: Retrieve a registered rule by it's ID
  @param {String} id
  @param {Function} callback( error, result )
  @return {Request}