Who imported me?

who-imported.html

<script src="node_modules/steal/steal.js"></script>
<script>
    var oldNormalize = System.normalize;
    System.normalize = function(name, parentName){
        return oldNormalize.apply(this, arguments).then(function(name){
            if(name === "my/module") {
                console.log(name, "is imported by", parentName);
            }
            return name;
        });
    };
</script>