retweetedStatus property
Users can amplify the broadcast of Tweets authored by other users by retweeting. Retweets can be distinguished from typical Tweets by the existence of a retweeted_status attribute. This attribute contains a representation of the original Tweet that was retweeted. Note that retweets of retweets do not show representations of the intermediary retweet, but only the original Tweet. (Users can also unretweet a retweet they created by deleting their retweet.)
Implementation
Tweet? retweetedStatus;