{"ast_node_type":"function","tokens":[{"end":83,"kind":"keyword","start":0,"text":"fn"}]}
    fn visit_const_operand(&mut self, constant: &ConstOperand<'tcx>, _: Location) {
impl<'tcx> Visitor<'tcx> for RequiredConstsVisitor<'tcx> {
        if constant.const_.is_required_const() {