ResourceBookingField::getFormattedValueForExport

protected function getFormattedValueForExport($fieldValue, int $itemId, Options $displayOptions): string
{
	if (!Loader::includeModule('calendar') || !Calendar::isResourceBookingEnabled())
	{
		return parent::getFormattedValueForExport($fieldValue, $itemId, $displayOptions);
	}

	$results = [];

	if (!$this->isMultiple())
	{
		return $this->getPreparedValue($fieldValue, $itemId);
	}

	foreach ($fieldValue as $elementId)
	{
		$results[] = $this->getPreparedValue($fieldValue, $itemId);
	}

	return implode($displayOptions->getMultipleFieldsDelimiter(), $results);
}