{"ast_node_type":"function","tokens":[{"end":71,"kind":"keyword","start":0,"text":"fn"}]}
    fn lower_target_expr(&mut self, block: &Block) -> hir::Expr<'hir> {
    // https://github.com/rust-lang/rfcs/pull/3530#issuecomment-2197170600.
        if let [stmt] = block.stmts.as_slice()