docs: function (evt, args) {
              var res = {
                  content : null
              };
              if (evt.downloadFailed) {
                  res.downloadFailed = evt.downloadFailed;
              }
              if (evt.logicalPaths.length > 0) {
                  res.content = this.getFileContent(evt.logicalPaths[0]);
              }
              this.$callback(args.origCb, res);
          }