syntax_data: {"ast_node_type":"function","tokens":[{"end":69,"kind":"keyword","start":0,"text":"pub"}]}
source_snippet:     pub fn split(self) -> (ty::Binder<I, FnSigTys<I>>, FnHeader<I>) {
context_before:     // Used to split a single value into the two fields in `TyKind::FnPtr`.
context_after:         let hdr =