+ * Deletes a specific AlignmentAnnotation from the alignment, and optionally
+ * removes any reference from any SequenceI or SequenceGroup object's
+ * annotation if and only if aa is contained within the alignment's annotation
+ * vector. Otherwise, it will do nothing.
+ *
+ * @param aa
+ * the annotation to delete
+ * @param unhook
+ * flag indicating if any references should be removed from
+ * annotation - use this if you intend to add the annotation back
+ * into the alignment
+ * @return true if annotation was deleted from this alignment.
+ */
+ public boolean deleteAnnotation(AlignmentAnnotation aa, boolean unhook);
+
+ /**
+ * Get the annotation associated with this alignment (this can be null if no
+ * annotation has ever been created on the alignment)