{"ast_node_type":"other","tokens":[{"end":60,"kind":"keyword","start":0,"text":"ObligationCauseCode::BuiltinDerivedHost(derived)"}]}
            ObligationCauseCode::BuiltinDerivedHost(derived)
            }
            | ObligationCauseCode::ImplDerivedHost(box ImplDerivedHostCause { derived, .. }) => {