syntax_data: {"ast_node_type":"other","tokens":[{"end":82,"kind":"keyword","start":0,"text":"ty::PredicateKind::Clause(ty::ClauseKind::UnstableFeature(_sym))"}]}
source_snippet:             ty::PredicateKind::Clause(ty::ClauseKind::UnstableFeature(_sym)) => {}
context_before:             }
context_after:             ty::PredicateKind::Ambiguous => {}