AttendeesCollection::__toString

public function __toString(): string
{
	if (empty($this->collection))
	{
		return '';
	}

	$result = [];
	foreach ($this->collection as $attendee)
	{
		if (!empty($attendee->getFullName()))
		{
			$result[] = $attendee->getFullName();
		}
	}

	return implode(', ', $result);
}