syntax_data: {"ast_node_type":"other","tokens":[{"end":43,"kind":"keyword","start":0,"text":"self.trait_ref.self_ty().print(p)?;"}]}
source_snippet:         self.trait_ref.self_ty().print(p)?;
context_before:     ty::TraitPredicate<'tcx> {
context_after:         write!(p, ": ")?;