def METHOD_NAME(
    pixel: Optional[RowCol] = None,
    xy: Optional[XY] = None,
    lonlat: Optional[LonLat] = None,
) -> Union[Tuple[str, SomeCoord], Tuple[None, None]]:
    if pixel is not None:
        return "pixel", pixel
    if xy is not None:
        return "native", xy
    if lonlat is not None:
        return "lonlat", lonlat
    return (None, None)