public function beenCalled($times = null)
{
if (!$this->history->beenCalled($times)) {
$times = $times ? ' ' . $times . ' time' . ($times != 1 ? 's' : '') : '';
throw new AssertionFailedException($this->methodCall . " was not called" . $times . "\n" . (new HistoryPrinter())->printAll($this->mockster));
}
}