public byte[] getValue(byte[] family, byte[] qualifier) {
    Cell kv = getColumnLatestCell(family, qualifier);
    if (kv == null) {
      return null;
    }
    return CellUtil.cloneValue(kv);
  }
Get the latest version of the specified column. Note: this call clones the value content of the
hosting Cell. See {@link #getValueAsByteBuffer(byte[], byte[])}, etc., or {@link #listCells()}
if you would avoid the cloning.
@param family    family name
@param qualifier column qualifier
@return value of latest version of column, null if none found
hbase-client/src/main/java/org/apache/hadoop/hbase/client/Result.java