text: 'use strict';
  
  /**
   * Set the query function used to look up other 'single' jobs.
   * @name Agenda#singlequery
   * @function
   * @param {Func} singleQuery The single query function
   * @returns {exports} agenda instance
   */
  module.exports = function(singleQuery) {
    this._singleQuery = singleQuery;
    return this;
  };
  