syntax_data: {"ast_node_type":"function","tokens":[{"end":68,"kind":"keyword","start":0,"text":"pub"}]}
source_snippet:     pub fn with(self, hdr: FnHeader<I>) -> ty::Binder<I, FnSig<I>> {
context_before:     // Used to combine the two fields in `TyKind::FnPtr` into a single value.
context_after:         self.map_bound(|sig_tys| FnSig {