Function isPromiseLike

packages/angular_devkit/schematics/src/sink/sink.ts:178–180

(value: U | PromiseLike<T>)

}

function isPromiseLike<T, U = unknown>(value: U | PromiseLike<T>): value is PromiseLike<T> {
  return !!value && typeof (value as PromiseLike<T>).then === 'function';
}