'Return the default :class:`matplotlib.tri.TriFinder` of this
triangulation, creating it if necessary.  This allows the same
TriFinder object to be easily shared.'

def get_trifinder(self):

    if (self._trifinder is None):
        from matplotlib.tri.trifinder import TrapezoidMapTriFinder
        self._trifinder = TrapezoidMapTriFinder(self)
    return self._trifinder
