{"ast_node_type":"other","tokens":[{"end":73,"kind":"keyword","start":0,"text":"type"}]}
                    type Result = ControlFlow<Option<&'v hir::Expr<'v>>>;
                impl<'v> Visitor<'v> for LetVisitor {
                    fn visit_stmt(&mut self, ex: &'v hir::Stmt<'v>) -> Self::Result {