syntax_data: {"ast_node_type":"other","tokens":[{"end":74,"kind":"keyword","start":0,"text":"cause.clone().derived_cause(parent_trait_pred,"}]}
source_snippet:                 cause.clone().derived_cause(parent_trait_pred, |derived| {
context_before:             } else {
context_after:                     ObligationCauseCode::ImplDerived(Box::new(ImplDerivedCause {