docs: function () {
      var chunks = [];
      return through2.obj(function (file, enc, cb) {
          chunks.push(file);
          var string = file._contents.toString();
          var regex  = /\/\*\*debug:start\*\*\/[\s\S]*\/\*\*debug:end\*\*\//g;
          var stripped = string.replace(regex, "");
          file.contents = new Buffer(stripped);
          this.push(file);
          cb();
      });
  }