+ /**
+ * Setter for visitor instance
+ *
+ * @param $visitorInstance An instance of a Visitor class
+ * @return void
+ */
+ protected final function setVisitorInstance (Visitor $visitorInstance) {
+ $this->visitorInstance = $visitorInstance;
+ }
+
+ /**
+ * Getter for visitor instance
+ *
+ * @return $visitorInstance An instance of a Visitor class
+ */
+ protected final function getVisitorInstance () {
+ return $this->visitorInstance;
+ }
+
+ /**
+ * Setter for the list instance
+ *
+ * @param $listInstance A list of Listable
+ * @return void
+ */
+ protected final function setListInstance (Listable $listInstance) {
+ $this->listInstance = $listInstance;
+ }
+
+ /**
+ * Getter for the list instance
+ *
+ * @return $listInstance A list of Listable
+ */
+ protected final function getListInstance () {
+ return $this->listInstance;
+ }
+