Python: Show getCallableForArgument can have multiple results

python/ql/test/experimental/dataflow/typetracking/multiple_callables.py

@@ -0,0 +1,15 @@
+def foo(foo_x):  # $tracked
+    print("foo", foo_x)  # $tracked
+
+
+def bar(bar_x):  # $tracked
+    print("bar", bar_x)  # $tracked
+
+
+if len(__file__) % 2 == 0:
+    f = foo
+else:
+    f = bar
+
+x = tracked  # $tracked
+f(x)  # $tracked