npm-check-updates/build/src/types/MockedVersions.d.ts

Find newer versions of dependencies than what your package.json allows

import { Index } from './IndexType';
import { Options } from './Options';
import { Packument } from './Packument';
import { Version } from './Version';
export type MockedVersions = Version | Partial<Packument> | Index<Version> | Index<Partial<Packument>> | ((options: Options) => Index<Version> | Index<Partial<Packument>> | null);