pl 

channelId (TActivitySnippet)

pl 

channelTitle (TActivitySnippet)

pl 

description (TActivitySnippet)

pl 

groupId (TActivitySnippet)

pl 

publishedAt (TActivitySnippet)

pl 

thumbnails (TActivitySnippet)

pl 

title (TActivitySnippet)

pl 

_type (TActivitySnippet)