import { NgtxFixture } from '../core/fixture'; import { NgtxTestEnv } from './test-env'; import { ExtensionFnMarker, ExtensionFnSignature, WhenStatement } from './types'; export declare const createDeclarativeTestingApi: (fx: NgtxFixture, existingTestEnv?: NgtxTestEnv) => WhenStatement; export declare const createExtension: (fn: ExtensionFnSignature) => ExtensionFnSignature & ExtensionFnMarker;