pl 

actor (TActivityTypeobject)

pl 

attachments (TActivityTypeobject)

pl 

content (TActivityTypeobject)

pl 

id (TActivityTypeobject)

pl 

objectType (TActivityTypeobject)

pl 

originalContent (TActivityTypeobject)

pl 

plusoners (TActivityTypeobject)

pl 

replies (TActivityTypeobject)

pl 

resharers (TActivityTypeobject)

pl 

url (TActivityTypeobject)