def is_nested_object(obj):
    """
    return a boolean if we have a nested object, e.g. a Series with 1 or
    more Series elements

    This may not be necessarily be performant.

    """

    if isinstance(obj, ABCSeries) and is_object_dtype(obj):

        if any(isinstance(v, ABCSeries) for v in obj.values):
            return True

    return False