@classmethod
    def shave_cache(self, filename, bbox):
        x1,y1,x2,y2 = bbox
        conn = db.connect(filename)
        conn.execute('delete from tiles where Intersects(bounds, BuildMBR({x1},{y1},{x2},{y2}))'.format(**locals()))
        conn.close()
Empties a cache of all records overlapping a certain bounding box so they are regenerated on demand.  For
dataset/ETHPy150Open hydroshare/hydroshare2/ga_resources/drivers/__init__.py/WMSResultsCache.shave_cache