code: function (code) {
          var list = [];
          var uniq = {};
  
          code
          .replace(SLASH_RE, '')
          .replace(INCLUDE_RE, function(m, m1, m2) {
              if (m2 && !uniq.hasOwnProperty(m2)) {
                  list.push(m2);
                  uniq[m2] = true;
              }
          });
  
        return list;
      }
docs: 依赖分析