declare module 'rollup-plugin-typescript' { function typescript(): any; export = typescript; } declare module 'rollup-plugin-node-resolve' { function resolve(): any; export = resolve; } declare module 'jest-snapshot' { export class SnapshotState { constructor(testFile: string, options: any); save(): any; } type matchResult = { pass: boolean; report(): string; }; export function toMatchSnapshot( received: any, propertyMatchers?: any, testName?: string, ): matchResult; }