def METHOD_NAME(cuda):
    """
    Extracts the highest compute capbility from all available GPUs, as compute
    capabilities are downwards compatible. If no GPUs are detected, it returns
    None.
    """
    ccs = get_compute_capabilities(cuda)
    if ccs is not None:
        # TODO: handle different compute capabilities; for now, take the max
        return ccs[-1]
    return None