def METHOD_NAME():
    aper = CirclePixelRegion(PixCoord(5, 5), radius=10.)
    mask = aper.to_mask()
    slc = ((slice(0, 16, None), slice(0, 16, None)),
           (slice(5, 21, None), slice(5, 21, None)))
    assert mask.get_overlap_slices((25, 25)) == slc