boolean isTransparencyAvailable();
/**
- * get current displayed types
+ * get current displayed types, in ordering of rendering (on top last)
*
- * @return
+ * @return a (possibly empty) list of feature types
*/
- String[] getDisplayedFeatureTypes();
+ List<String> getDisplayedFeatureTypes();
/**
* get current displayed groups
*
- * @return
+ * @return a (possibly empty) list of feature groups
*/
- String[] getDisplayedFeatureGroups();
+ List<String> getDisplayedFeatureGroups();
/**
* display all features of these types
*/
void setVisible(String featureType);
+ /**
+ * Answers true if the feature has 'featureNumber' properties set
+ *
+ * @param featureType
+ * @return
+ */
+ boolean isOrdinal(String featureType);
+
}