code: function implode (list, separator) {
          var retVal = '',
              prototypeOfList = Object.getPrototypeOf(list);
          if (isArray(list)) {
              retVal = list.join(separator);
          }
          else if (prototypeOfList.constructor.name === 'Set' || prototypeOfList.constructor.name === 'SjlSet') {
              retVal = [];
              list.forEach(function (value) {
                  retVal.push(value);
              });
              retVal = retVal.join(separator);
          }
          return retVal;
      }
docs: Implodes a `Set`, `Array` or `SjlSet` passed in.
  @function module:sjl.implode
  @param list {Array|Set|SjlSet} - Members to join.
  @param separator {String} - Separator to join members with.
  @returns {string} - Imploded string.  *Returns empty string if no members, to join, are found.