eventespresso / event-espresso-core

			) );

			$ticket_line_item->add_child_line_item( $cancellation_line_item );

		}

		if ( $ticket_line_item->save_this_and_descendants() > 0 ) {

			// decrement parent line item quantity

			$event_line_item = $ticket_line_item->parent();

			if ( $event_line_item instanceof EE_Line_Item && $event_line_item->OBJ_type() === 'Event' ) {

				$event_line_item->set_quantity( $event_line_item->quantity() - $qty );

				$event_line_item->save();

			}

			EEH_Line_Item::get_grand_total_and_recalculate_everything( $ticket_line_item );

			return true;

		}

		return false;

	}

		}

		// increment ticket quantity

		$ticket_line_item->set_quantity( $ticket_line_item->quantity() + $qty );

		if ( $ticket_line_item->save_this_and_descendants() > 0 ) {

			// increment parent line item quantity

			$event_line_item = $ticket_line_item->parent();

			if ( $event_line_item instanceof EE_Line_Item && $event_line_item->OBJ_type() === 'Event' ) {

				$event_line_item->set_quantity( $event_line_item->quantity() + $qty );

			}

			EEH_Line_Item::get_grand_total_and_recalculate_everything( $ticket_line_item );

			return true;

		}

		return false;

	}