{"ast_node_type":"variable","tokens":[{"end":28,"kind":"keyword","start":0,"text":"let"}]}
                let result =
                    .alloc_expr(try_from_residual.map_or(Expr::Missing, Expr::Path), syntax_ptr);
                    self.alloc_expr(Expr::Call { callee, args: Box::new([it]) }, syntax_ptr);