code: function handleInputFocus(target, event) {
          if (spec.templating.isEditInput(target)) {
              var fileId = spec.templating.getFileId(target),
                  status = spec.onGetUploadStatus(fileId);
  
              if (status === qq.status.SUBMITTED) {
                  spec.log(qq.format("Detected valid filename input focus event on file '{}', ID: {}.", spec.onGetName(fileId), fileId));
                  inheritedInternalApi.handleFilenameEdit(fileId, target);
              }
          }
      }
docs: This will be called by the parent handler when a `focusin` event is received on the list element.