{"ast_node_type":"variable","tokens":[{"end":86,"kind":"keyword","start":0,"text":"let"}]}
        let fn_expr = self.arena.alloc(self.expr(span, hir::ExprKind::Path(fn_path)));
        let fn_path = hir::QPath::LangItem(hir::LangItem::RangeInclusiveNew, self.lower_span(span));
        hir::ExprKind::Call(fn_expr, arena_vec![self; e1, e2])