syntax_data: {"ast_node_type":"function","tokens":[{"end":45,"kind":"keyword","start":0,"text":"pub"}]}
source_snippet:     pub fn new(root: I::GenericArg) -> Self {
context_before: impl<I: Interner> TypeWalker<I> {
context_after:         Self { stack: smallvec![root], last_subtree: 1, visited: SsoHashSet::new() }