static byte[] checkRow(final byte[] row) {
    return checkRow(row, 0, row == null ? 0 : row.length);
  }
@param row Row to check
@throws IllegalArgumentException Thrown if <code>row</code> is empty or null or &gt;
                                 {@link HConstants#MAX_ROW_LENGTH}
@return <code>row</code>
hbase-client/src/main/java/org/apache/hadoop/hbase/client/Mutation.java