question: gets the value of the bookingconfirmationnumber property . concode_field_sep String bookingConfirmationNumber concode_elem_sep ExpressFreightDetailContact undeliverableContact concode_elem_sep Boolean packingListEnclosed concode_elem_sep Boolean referenceLabelRequested concode_elem_sep ExpressFreightDetailContact beforeDeliveryContact concode_elem_sep BigInteger shippersLoadAndCount concode_field_sep BigInteger getShippersLoadAndCount concode_elem_sep ExpressFreightDetailContact getUndeliverableContact concode_elem_sep Boolean isReferenceLabelRequested concode_elem_sep ExpressFreightDetailContact getBeforeDeliveryContact concode_elem_sep void setBeforeDeliveryContact concode_elem_sep void setShippersLoadAndCount concode_elem_sep void setPackingListEnclosed concode_elem_sep void setUndeliverableContact concode_elem_sep Boolean isPackingListEnclosed concode_elem_sep void setBookingConfirmationNumber concode_elem_sep void setReferenceLabelRequested
target: String function ( ) { return bookingConfirmationNumber ; }