1090     on(type: 'progress', callback: (receivedSize: number, totalSize: number) => void): void;  method
1168     on(type: 'complete' | 'pause' | 'remove', callback: () => void): void;  method
1240     on(type: 'fail', callback: (err: number) => void): void;  method
2118     on(type: 'progress', callback: (uploadedSize: number, totalSize: number) => void): void;  method
2190     on(type: 'headerReceive', callback: (header: object) => void): void;  method
2259     on(type: 'complete' | 'fail', callback: Callback<Array<TaskState>>): void;  method
4431       on(event: 'progress', callback: (progress: Progress) => void): void;  method
4479       on(event: 'completed', callback: (progress: Progress) => void): void;  method
4527       on(event: 'failed', callback: (progress: Progress) => void): void;  method
4562       on(event: 'pause', callback: (progress: Progress) => void): void;  method
4584       on(event: 'resume', callback: (progress: Progress) => void): void;  method
4606       on(event: 'remove', callback: (progress: Progress) => void): void;  method
4629       on(event: 'response', callback: Callback<HttpResponse>): void;  method