WIP: Go: Add context query for retrieving call graph edges

go/ql/src/CallGraph.ql

@@ -0,0 +1,15 @@
+/**
+ * @name Call graph
+ * @description Generates the call graph for the program.
+ * @kind graph
+ * @id go/call-graph
+ */
+
+import go
+import semmle.go.dataflow.DataFlow
+
+query predicate edges(CallExpr call, Function f, string key, string value) {
+  call.getTarget() = f and
+  key = "semmle.label" and
+  value = f.getQualifiedName()
+}