`TActivityTypeobjectTypeattachmentsItem`
pt		Setcontent
pt		SetdisplayName
pt		Setembed
pt		SetfullImage
pt		Setid
pt		Setimage
pt		SetobjectType
pt		SetpreviewThumbnails
pt		Setthumbnails
pt		Seturl

`TGoogleBaseObject`
		AllowAdditionalProperties