Qv.Document.GetObject actually takes two parameters. The first parameter is the object id, the second parameter is the function callback when the object is rendered (the second parameter is missing from the argument list in the documentation). The object returned by the GetObject call may or may not have data; it depends on if the object has already been drawn.
But know I have a other problem, I want to see every single field this is selected. But for example, when I take many distinct values, then there are the text shows for example 18 of 80 selected, but I want every single value.