public Delete addColumn(byte[] family, byte[] qualifier, long timestamp) {
    checkTimestamp(ts);
    List<ExtendedCell> list = getCellList(family);
    KeyValue kv = new KeyValue(this.row, family, qualifier, timestamp, KeyValue.Type.Delete);
    list.add(kv);
    return this;
  }
Delete the specified version of the specified column.
@param family    family name
@param qualifier column qualifier
@param timestamp version timestamp
@return this for invocation chaining
hbase-client/src/main/java/org/apache/hadoop/hbase/client/Delete.java