public function checkCompleted()
{
$cardinality = $this->resetCardinality()->assertSingular();
$endEvent = $this->call->endEvent();
list($matchCount, $matchingEvents) = $this->matchIf($endEvent, $endEvent);
if ($cardinality->matches($matchCount, 1)) {
return $this->assertionRecorder->createSuccess($matchingEvents);
}
}