...

["_upsell_ids"]=>
array(1) {
[0]=>
string(6) "a:0:{}"
}
["_crosssell_ids"]=>
array(1) {
[0]=>
string(6) "a:0:{}"
}
["_product_version"]=>
array(1) {
[0]=>
string(5) "2.6.1"
}
["_product_image_gallery"]=>
array(1) {
[0]=>
string(0) ""
}
["woocommerce_booking_settings"]=>
array(1) {
[0]=> {
    ["booking_specific_date"]=>
    array(2) {
    [0]=>
    string(9) "30-6-2016"
    [1]=>
    string(8) "8-7-2016"
    }
}
...