- boolean isTransparencyAvailable();
-
- String[] getDisplayedFeatureTypes();
-
- String[] getDisplayedFeatureGroups();
-
+ /**
+ * get current displayed types, in ordering of rendering (on top last)
+ *
+ * @return a (possibly empty) list of feature types
+ */
+
+ List<String> getDisplayedFeatureTypes();
+
+ /**
+ * get current displayed groups
+ *
+ * @return a (possibly empty) list of feature groups
+ */
+ List<String> getDisplayedFeatureGroups();
+
+ /**
+ * display all features of these types
+ *
+ * @param featureTypes
+ */