insertMatch method
Implementation
void insertMatch(SourceTree tree, Match match, int index) {
SourceNode? root = findElement(children, (child) => child.accessor == match.paths[0][index]);
if (root == null) {
children.add(root = tree.makeNode(
this,
match.paths[0][index], // step
match.paths[0].length - 1 == index ? match : null));
}
if (match.paths[0].length > index + 1) {
root.insertMatch(tree, match, index + 1);
}
}