{"ast_node_type":"other","tokens":[{"end":54,"kind":"keyword","start":0,"text":"if"}]}
        if lhs.as_local() == Some(mir::RETURN_PLACE) {
    if let mir::StatementKind::Assign(box (lhs, rhs)) = &stmt.kind {
            if let mir::Rvalue::Use(mir::Operand::Copy(rhs) | mir::Operand::Move(rhs)) = rhs {