code: function (runtime, path, rules) {
              var mappedRules = rules ||
                      runtime.Config.mappedRules ||
                      [],
                  i,
                  m,
                  rule;
              for (i = 0; i < mappedRules.length; i++) {
                  rule = mappedRules[i];
                  if (m = path.match(rule[0])) {
                      return path.replace(rule[0], rule[1]);
                  }
              }
              return path;
          }
docs: Get mapped path.
  @param runtime Module container, such as KISSY
  @param {String} path module path
  @param [rules] map rules
  @return {String} mapped path