+ * Returns an iterable collection of any annotations that match on given
+ * sequence ref, calcId and label (ignoring null values).
+ *
+ * @param seq
+ * null or reference sequence to select annotation for
+ * @param calcId
+ * null or the calcId to select annotation for
+ * @param label
+ * null or the label to select annotation for
+ */
+ Iterable<AlignmentAnnotation> findAnnotations(SequenceI seq,
+ String calcId, String label);
+
+ /**