syntax_data: {"ast_node_type":"function","tokens":[{"end":75,"kind":"keyword","start":0,"text":"pub"}]}
source_snippet:     pub fn with_self_ty(self, interner: I, self_ty: I::Ty) -> TraitRef<I> {
context_before:     /// or some placeholder type.
context_after:         // otherwise the escaping vars would be captured by the binder