[flexcoders] Is there a way to detect whether a TextLine is partially cut-off (vertically) in TLF?

[Baz]

Say you had a container that was 15px tall, and each TextLine was 10px high
- the last TextLine would be vertically clipped by 5px, but since it is
partially visible, TLF would mark it as visible. Anyone know if there is a
smart way to detect when a TextLine is vertically clipped?

Thanks,
Baz