{"ast_node_type":"function","tokens":[{"end":78,"kind":"keyword","start":0,"text":"fn"}]}
    fn visit_operand(&mut self, operand: &Operand<'tcx>, location: Location) {
impl<'a, 'tcx> Visitor<'tcx> for TypeChecker<'a, 'tcx> {
        // This check is somewhat expensive, so only run it when -Zvalidate-mir is passed.