* @param bins array of bin name/value pairs
* @throws AerospikeException if append fails
*/
public final void append(WritePolicy policy, Key key, Bin... bins) throws AerospikeException {
WriteCommand command = new WriteCommand(cluster, policy, key, bins, Operation.Type.APPEND);
command.execute();
}
/**
* Prepend bin string values to existing record bin values.
* The policy specifies the transaction timeout, record expiration and how the transaction is