Visible for testing.\n */\nfunction setAbortableTimeout(\n signal: AnalyticsAbortSignal,\n throttleEndTimeMillis: number\n): Promise AbortController's AbortSignal conveniently decouples fetch timeout logic from other aspects\n * of networking, such as retries. Firebase doesn't use AbortController enough to justify a\n * polyfill recommendation, like we do with the Fetch API, but this minimal shim can easily be\n * swapped out if/when we do.\n */\nexport class AnalyticsAbortSignal {\n listeners: Array<() => void> = [];\n addEventListener(listener: () => void): void {\n this.listeners.push(listener);\n }\n abort(): void {\n this.listeners.forEach(listener => listener());\n }\n}\n","/**\n * @license\n * Copyright 2020 Google LLC\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport {\n DynamicConfig,\n Gtag,\n MinimalDynamicConfig\n} from '@firebase/analytics-types';\nimport { GtagCommand, GA_FID_KEY, ORIGIN_KEY } from './constants';\nimport { FirebaseInstallations } from '@firebase/installations-types';\nimport { fetchDynamicConfigWithRetry } from './get-config';\nimport { logger } from './logger';\nimport { FirebaseApp } from '@firebase/app-types';\nimport {\n isIndexedDBAvailable,\n validateIndexedDBOpenable\n} from '@firebase/util';\nimport { ERROR_FACTORY, AnalyticsError } from './errors';\n\nasync function validateIndexedDB(): Promise