{"ast_node_type":"variable","tokens":[{"end":85,"kind":"keyword","start":0,"text":"let"}]}
    let (hir_id, span) = if let Node::Expr(par_expr) = cx.tcx.parent_hir_node(hir_id)
    // Look past casts to support cases like `0..256 as u8`
        && let ExprKind::Cast(_, _) = par_expr.kind