If I understand your question, ,you know how to set the opacity of the disappearing object to 0, as in
<item>.setOPacity(0)
What happens when you have the naming object say <item>, as in
<namingObject>.say("object: " + <item>);
You probably need to have some sort of String (like "object: " to add the disappearing object name).
Let me know if this is not quite your question, at
don@alice.org