syntax_data: {"ast_node_type":"other","tokens":[{"end":37,"kind":"keyword","start":0,"text":"write!(p,"}]}
source_snippet:         write!(p, ": {constness} ")?;
context_before:         self.trait_ref.self_ty().print(p)?;
context_after:         self.trait_ref.print_trait_sugared().print(p)?;