def setup_test_trending(self, testobj, testconf):
        trendobj = Trend(testconf,
                         self._rradir,
                         rrdapi=self._rrdapi,
                         private=testobj.private())
        testobj.addReportCallback(trendobj.update)
Pixel flood-fill. Reliable, but slow.
dataset/ETHPy150Open marineam/nagcat/python/nagcat/trend.py/TrendMaster.setup_test_trending--crossover with--dataset/ETHPy150Open jerith/depixel/depixel/io_png.py/Bitmap.fill_pix