code: function (modNames, refModName) {
              var ret = [], i, l;
              if (modNames) {
                  // 1. index map
                  for (i = 0, l = modNames.length; i < l; i++) {
                      // conditional loader
                      // requires:[window.localStorage?"local-storage":""]
                      if (modNames[i]) {
                          ret.push(pluginAlias(addIndexAndRemoveJsExt(modNames[i])));
                      }
                  }
              }
              // 2. relative to absolute (optional)
              if (refModName) {
                  ret = Utils.normalDepModuleName(refModName, ret);
              }
              return ret;
          }
docs: normalize module names with alias
  @param {String[]} modNames module names
  @param [refModName] module to be referred if module name path is relative
  @return {String[]} normalize module names with alias