{"ast_node_type":"variable","tokens":[{"end":56,"kind":"keyword","start":0,"text":"let"}]}
            let var = self.variable(hir_id, ident.span);
            let ln = entry_ln.unwrap_or_else(|| self.live_node(hir_id, pat_sp));
            let id_and_sp = (hir_id, pat_sp, ident.span);