{"ast_node_type":"variable","tokens":[{"end":77,"kind":"keyword","start":0,"text":"let"}]}
        let (pat, hir_id) = self.pat_ident_binding_mode_mut(span, ident, bm);
    ) -> (&'hir hir::Pat<'hir>, HirId) {
        (self.arena.alloc(pat), hir_id)