CloseableUtil.closeQuietly(in);

        final String rowCount = extractData.getValues("row_count")[0];
        // Should extract 2 data rows (header doesn't count toward maxRows)
        assertEquals("2", rowCount);
    }

 * recommended that the caller does not persist a reference to the backing map (unless the backing
 * map is immutable).
 *
 * <p>This class is tailored toward use cases in common.graph. It is *NOT* a general purpose map.
 *
 * @author James Sexton
 */
class MapIteratorCache<K, V> {
  private final Map<K, V> backingMap;

  /*