syntax_data: {"ast_node_type":"function","tokens":[{"end":69,"kind":"keyword","start":0,"text":"pub"}]}
source_snippet:     pub fn fn_sig(self, interner: I) -> ty::Binder<I, ty::FnSig<I>> {
context_before: impl<I: Interner> TyKind<I> {
context_after:         match self {