default ResultScanner getScanner(byte[] family, byte[] qualifier) {
    return getScanner(new Scan().addColumn(family, qualifier));
  }
Gets a scanner on the current table for the given family and qualifier.
@param family    The column family to scan.
@param qualifier The column qualifier to scan.
@return A scanner.
hbase-client/src/main/java/org/apache/hadoop/hbase/client/AsyncTable.java