docs: @Override
      protected boolean isColumnVisible(int colFlag) {
  
          if (colFlag == LIST_COLUMN_TYPEICON.hashCode()) {
              return true;
          }
          if (colFlag == LIST_COLUMN_NAME.hashCode()) {
              return true;
          }
          if (colFlag == CmsUserSettings.FILELIST_TITLE) {
              return true;
          }
          if (colFlag == CmsUserSettings.FILELIST_DATE_LASTMODIFIED) {
              return true;
          }
          return false;
      }