+ return isNewPost(postId, true);
+ }
+
+ /**
+ * Returns whether the given post ID is new. If {@code markAsKnown} is
+ * {@code true} then after this method returns the post ID is marked a known
+ * post ID.
+ *
+ * @param postId
+ * The post ID
+ * @param markAsKnown
+ * {@code true} to mark the post ID as known, {@code false} to
+ * not to mark it as known
+ * @return {@code true} if the post is considered to be new, {@code false}
+ * otherwise
+ */
+ public boolean isNewPost(String postId, boolean markAsKnown) {