{"ast_node_type":"function","tokens":[{"end":85,"kind":"keyword","start":0,"text":"fn"}]}
                    fn visit_stmt(&mut self, ex: &'v hir::Stmt<'v>) -> Self::Result {
                    type Result = ControlFlow<Option<&'v hir::Expr<'v>>>;
                        if let hir::StmtKind::Let(&hir::LetStmt { pat, init, .. }) = ex.kind