Whether the given interval is completely within this interval.
The interval to check for inclusion in this interval.
assert(NegInfInterval!Date(Date(2012, 3, 1)).contains( NegInfInterval!Date(Date(1996, 5, 4)))); assert(!NegInfInterval!Date(Date(2012, 3, 1)).contains( NegInfInterval!Date(Date(2013, 7, 9))));
See Implementation
Whether the given interval is completely within this interval.