docs: function configure(obj, fossa) {
    function get(key, backup) {
      return key in obj ? obj[key] : backup;
    }
  
    //
    // Allow new options to be be merged in against the original object.
    //
    get.merge = function merge(properties) {
      return fossa.merge(obj, properties);
    };
  
    return get;
  }