def METHOD_NAME(self, obj):
    """
    Returns list of all related attachments to specific object.
    Example of use:
    >>> obj = DataCenterAsset.objects.get(id=2)
    >>> Attachment.objects.get_attachments_for_object(obj)
    [<Attachment: document.pdf (application/pdf) uploaded by root>]
    """
    content_type = get_content_type_for_model(obj)
    return self.get_queryset().filter(
        items__content_type=content_type,
        items__object_id=obj.id,
    )