tt_content.calendar =< lib.contentElement
tt_content.calendar {
    templateName = Calendar
    dataProcessing {
        10 = TYPO3\CMS\Frontend\DataProcessing\DatabaseQueryProcessor
        10 {
            table = tx_epproducts_domain_model_hotel
            where.data = field:tx_eptheme_context_hotel
            where.wrap = uid=|
            pidInList = 5
            as = hotel
        }
    }
}