Python: Make toString abstract

tausbn · tausbn · commit c5d6792c1eb7 · 2021-02-03T19:52:40.000+01:00
diff --git a/python/ql/src/semmle/python/ApiGraphs.qll b/python/ql/src/semmle/python/ApiGraphs.qll
@@ -146,9 +146,7 @@ module API {
     /**
      * Gets a textual representation of this node.
      */
-    string toString() {
-      none() // defined in subclasses
-    }
+    abstract string toString();
 
     /**
      * Gets a path of the given `length` from the root to this node.
