Function addToMultimap

test/fixtures/snapshot/typescript.js:119606–119613

(map, k, v)

        }
        BuilderState.createManyToManyPathMap = createManyToManyPathMap;
        function addToMultimap(map, k, v) {
            var set = map.get(k);
            if (!set) {
                set = new ts.Set();
                map.set(k, set);
            }
            set.add(v);
        }
        function deleteFromMultimap(map, k, v) {
            var set = map.get(k);
            if (set === null || set === void 0 ? void 0 : set.delete(v)) {