{"ast_node_type":"variable","tokens":[{"end":94,"kind":"keyword","start":0,"text":"if"}]}
            if let mir::Rvalue::Use(mir::Operand::Copy(rhs) | mir::Operand::Move(rhs)) = rhs {
        if lhs.as_local() == Some(mir::RETURN_PLACE) {
                return rhs.as_local();