public Optional<Post> getPost(String postId);
/**
+ * Returns all posts from the given Sone.
+ *
+ * @param soneId
+ * The ID of the Sone
+ * @return All posts from the given Sone
+ */
+ public Collection<Post> getPosts(String soneId);
+
+ /**
* Returns all posts that have the given Sone as recipient.
*
* @see Post#getRecipient()