Quick test for interval containing interval

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Hey all,

Before I reinvent the wheel, does the code base have something like 
Interval::contains that accepts an interval as an argument instead of a point?

I could do

Interval foo(-1,1);
Interval bar (0, 2);

Direction d = LEFT;
contains = false;
do
{
  contains |= foo.contains(bar[d]);
}
while (flip (&d) != LEFT);

to get the result, but it seems like this sorta thing would exist already in 
the code base (I couldn't find it scanning interval.hh and interval.tcc).  Any 
ideas?

Cheers,
MS