public DatabaseTableData fromString(@Nullable @NonNls String s, ConvertContext convertContext) {
   DataSource dataSource =
       JavadocTableNameReferenceProvider.getDataSourceForIbatis(
           convertContext.getReferenceXmlElement());
   for (DatabaseTableData databaseTableData : dataSource.getTables()) {
     if (databaseTableData.getName().equals(s)) return databaseTableData;
   }
   return null;
 }
 public String toString(
     @Nullable DatabaseTableData databaseTableData, ConvertContext convertContext) {
   if (databaseTableData != null) return databaseTableData.getName();
   else return null;
 }