This is to fix the below error: ``` tools/firebase-test-utils/FirebaseRedirect.ts:17:50 - error TS2345: Argument of type '(string | RegExp)[][]' is not assignable to parameter of type 'ReplacementDetail[]'. Type '(string | RegExp)[]' is missing the following properties from type 'ReplacementDetail': 0, 1 17 return XRegExp.replaceEach(this.destination, [...paramReplacers, ...restReplacers]); ``` https://app.circleci.com/pipelines/github/angular/angular/31076/workflows/5fd3851e-ae9e-4d77-b0ef-366ba38a9088/jobs/961795 PR Close #41596