{"ast_node_type":"other","tokens":[{"end":20,"kind":"keyword","start":0,"text":"match"}]}
        match self {
    pub fn parent_with_predicate(&self) -> Option<(&Self, Option<ty::PolyTraitPredicate<'tcx>>)> {
            ObligationCauseCode::FunctionArg { parent_code, .. } => Some((parent_code, None)),