def _tracer(self, a=None, b=None):
Returns true if disjoint returns false.
dataset/ETHPy150Open amrdraz/kodr/app/brython/www/src/Lib/site-packages/turtle.py/TNavigator._tracer--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.2/django/contrib/gis/geos/geometry.py/GEOSGeometry.intersects