WorktimeService::getWorktimeManager

private function getWorktimeManager()
{
	if ($this->worktimeManager === null)
	{
		if (!$this->recordForm)
		{
			throw new ObjectException(WorktimeRecordForm::class . ' is required');
		}
		$this->worktimeManager = $this->worktimeManagerFactory->buildManager($this->recordForm);
	}
	return $this->worktimeManager;
}