* This function checks if the node is the active child by comparing its action
* to the current page URL obtained via $ME
*
+ * This function compares the nodes url to the static var {@link navigation_node::fullmeurl}
+ * and if they match (based on $strenght) then the node is considered active.
+ *
+ * Note: This function is recursive, when you call it it will check itself and all
+ * children recursivily.
+ *
* @staticvar moodle_url $fullmeurl
* @param int $strength When using the moodle_url compare function how strictly
* to check for a match. Defaults to URL_MATCH_EXACT