{"ast_node_type":"function","tokens":[{"end":69,"kind":"keyword","start":0,"text":"fn"}]}
                fn visit_expr(&mut self, ex: &'hir hir::Expr<'hir>) {
            impl<'hir> Visitor<'hir> for VariableUseFinder {
                    if let hir::ExprKind::Path(qpath) = &ex.kind