@vladmandic/face-api/src/globalApi/ComposableTask.ts

FaceAPI: AI-powered Face Detection & Rotation Tracking, Face Description & Recognition, Age & Gender & Emotion Prediction for Browser and NodeJS using TensorFlow/JS

export class ComposableTask<T> {
  // eslint-disable-next-line no-unused-vars
  public async then(onfulfilled: (value: T) => T | PromiseLike<T>): Promise<T> {
    return onfulfilled(await this.run());
  }

  public async run(): Promise<T> {
    throw new Error('ComposableTask - run is not implemented');
  }
}