put borders on tablebox at specific rows

[vince_faller]

It'd be nice if we could put some type of border for visual effect on tableboxes.  

Something like 

Names Default to Here(1);
dt = Open("$SAMPLE_DATA\Big Class.jmp");

new window("Row Borders", 
	tblbox = tablebox(
		NumberColBox("age", dt:age << Get Values),
		StringColbox("Sex", dt:sex << Get Values), 
		NumberColBox("Height", dt:height << Get Values)
	)
);
// if I want to put a border on top of the age differences
breaks = [9, 16, 28, 35, 38];

tblbox << Set Row Borders(breaks);

[Ryan_Gilmore]

We are archiving this request. If this is still important please comment with additional details and we will reopen. Thank you!