What does 'customObjKeyLists' mean in getCustomObjects?
When calling getCustomObjects(), there is a property named 'customObjKeyLists' in both request and response. Considering http://developers.marketo.com/documentation/soap/getcustomobjects/ , this property means "a key/value pair that is used to identify the custom objects you want to delete" in request. And in the sample code, I see that every customObj item in the response contains the customObjKeyLists which is the same as that in the request. I'm puzzled. What does it exactly mean?