def checkCanSplit(context, fixt):
    """
        Callback that we use to check whether the fixtures found in a
        context or ancestor are ones we care about.

        Contexts can tell us that their fixtures are reentrant by setting
        _multiprocess_can_split_. So if we see that, we return False to
        disregard those fixtures.
        """
    if not fixt:
        return False
    if getattr(context, '_multiprocess_can_split_', False):
        return False
    return True
