- * Answers a list of all features stored, optionally restricted to specified
- * types, in no particular guaranteed order
+ * Answers a list of all features stored, in no particular guaranteed order.
+ * Positional features may optionally be restricted to specified types, but
+ * all non-positional features (if any) are always returned.
+ * <p>
+ * To filter non-positional features by type, use
+ * getNonPositionalFeatures(type).