Change wrap title font size with JSL

[#1]

Is it possible to change the font size of wrap-plot titles in Graph Builder with JSL?  (JMP 16)

I'm also curious how experienced users go about answering this question for themselves...  I opened up the Properties pane of a GB window and clicked on a wrap-plot-title and it said it's a "GraphBuilderGroupBox".  So I created a new script and tried to change the font of one of those boxes but it errored out:

gb = Graph Builder(
	Size( 949, 830 ),
	Graph Spacing( 5 ),
	Variables( X( :Skill ), Wrap( :Proficiency Level ), Overlay( :Grade ) ),
	Elements( Bar( X, Legend( 12 ) ) ),
	SendToReport(
		Dispatch(
			{},
			"",
			ScaleBox,
			{Scale( "Log" ), Format( "Best", 6 ), Min( 0.5 ), Max( 111 ), Inc( 1 ),
			Minor Ticks( 1 )}
		)
	)
);gbb = Report( gb )[Graph Builder Box(1)]; gbb << Set Font Size( 48 );

Ideally we'd like a script that will let us toggle the font size of the wrap-titles in the current GB window from normal size to ~48 point.  Is this possible?

[#2]

This object does not respond to that message. It does not have a property for the font either.