/**
* Add operation.
*
* @param Operation $operation
* The operation to add to the connection.
*
* @return Operation
* The operation added.
*/
public function addOperation(Operation $operation)
{
if ($this->depth <= 0) {
$operation->commit($this);
return $operation;
}
$idx = $this->idx;
$this->idx++;
$this->operations[$idx] = $operation;
$operation->setIdx($this, $idx);
$operation->buffer($this);
return $operation;
}