code: private static String getRowIdColumn(ConnectorTableMetadata meta)
      {
          Optional<String> rowIdColumn = AccumuloTableProperties.getRowId(meta.getProperties());
          return rowIdColumn.orElse(meta.getColumns().get(0).getName()).toLowerCase(Locale.ENGLISH);
      }
docs: Gets the row ID based on a table properties or the first column name.
  
  @param meta ConnectorTableMetadata
  @return Lowercase Presto column name mapped to the Accumulo row ID