src/AbstractEngine.php
public function createSignalExecutionCommand(Execution $execution, $signal = null, array $variables = [], array $delegation = [])
    {
        return new SignalExecutionCommand($execution, $signal, $variables, $delegation);
    }
public function createSignalExecutionCommand(Execution $execution, $signal = null, array $variables = [], array $delegation = [])
    {
        return new SignalExecutionCommand($execution, $signal, $variables, $delegation);
    }
{@inheritdoc}