def elapsed_from_start(self, start):
        if (self.start < start):
            return self.end - start
        else:
            return self.elapsed
Initializes Feature from a pointer and its Layer object.
dataset/ETHPy150Open StorjOld/downstream-farmer/downstream_farmer/utils.py/WorkChunk.elapsed_from_start--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.5/django/contrib/gis/gdal/feature.py/Feature.__init__