- * Return an iterable set of any annotations in the collection that match the
- * provided criteria, i.e.
- * <ul>
- * <li>reference the same sequence datasequence</li>
- * <li>have the same calcId (source of annotation)</li>
- * <li>have the same label (type of annotation)</li>
- * </ul>
+ * Returns an iterable collection of any annotations that match on given
+ * sequence ref, calcId and label (ignoring null values).