code: function contentScope(content, file) {
      if (file) { // 已指定
        file = path.resolve(getDirname(), file);
      } else { // 未指定
        file = filename;
      }
      return create({
        fromString: true,
        content: content,
        clean: clean,
        removeList: removeList,
        excludeList: excludeList,
        rootScope: rootScope,
        filename: file,
        argv: argv,
        scopes: scopes,
        processors: processors,
        variants: variants,
        cacheKeys: cacheKeys,
        tags: tags
      });
    }
docs: forward compatbility 
  获取内容的作用域
  
  @param {string} content 对应文件名
  @param {string=} file 对应文件名
  @return {jdistsScope} 返回文件对应的作用域