code: private static void serializeRow(SSTableIdentityIterator row, DecoratedKey key, PrintStream out)
      {
          serializeRow(row.getColumnFamily().deletionInfo(), row, row.getColumnFamily().metadata(), key, out);
      }
docs: Get portion of the columns and serialize in loop while not more columns left in the row
  
  @param row SSTableIdentityIterator row representation with Column Family
  @param key Decorated Key for the required row
  @param out output stream