+
+ /**
+ * Answers true if feature would be shown, else false. A feature is shown if
+ * <ul>
+ * <li>its feature type is set to visible</li>
+ * <li>its feature group is either null, or set to visible</li>
+ * <li>it is not excluded by a colour threshold on score or other numeric
+ * attribute</li>
+ * <li>it is not excluded by a filter condition</li>
+ * </ul>
+ *
+ * @param feature
+ * @return
+ */
+ boolean isVisible(SequenceFeature feature);