        // test lists. This includes nodes that do not have child
                    // coverage data.
                    for (var index = 0; index < parent.test.length; index++) {
                        if (parent.children.has(index)) { continue; }

                        let test_node = parent.test[index];
                        let test_name_id = test_node[0];
                        let test_name = names[test_name_id];
                        let test_children = test_node[1];

                     