data: fixes for clearing on refresh

* reduce aggregation count when clearing
* added TokenLocation to method override edge
* added TokenLocations to template related edges

src/lib/data/search/SearchNode.h

@@ -77,6 +77,10 @@ private:
 
 	const std::string& m_name;
 	const Id m_nameId;
+
+	friend std::ostream& operator<<(std::ostream& ostream, const SearchNode* node);
 };
 
+std::ostream& operator<<(std::ostream& ostream, const SearchNode* node);
+
 #endif // SEARCH_NODE_H