*/
void removePosts(Sone sone);
+ void setPostKnown(Post post);
+ boolean isPostKnown(Post post);
void likePost(Post post, Sone localSone);
void unlikePost(Post post, Sone localSone);
+ boolean isLiked(Post post, Sone sone);
Set<Sone> getLikes(Post post);
}