syntax_data: {"ast_node_type":"other","tokens":[{"end":55,"kind":"keyword","start":0,"text":"ty::PredicateKind::ConstEquate(c1,"}]}
source_snippet:             ty::PredicateKind::ConstEquate(c1, c2) => {
context_before:             }
context_after:                 write!(p, "the constant `")?;