Using the LiveAPI is there a way to determine if a non-existent function is called?

In code if I do the following:

var apiObj = new LiveAPI('live_set')
apiObj.call('aget_current_smpte_song_time', 1)

I see in the Max console:

Is there a way to check (from the code) that I can call that function? That is, or the attribute exists?

Or, can is there a way to check that the return value is an error?
Typically I would use try...catch for this but it does not seem to work here.