#53258 breaks ckeditor__ckeditor5-upload on DT

Here is a small repro based on that package:

```ts
export default class FileReader implements Observable {
    set(option: Record<string, unknown>): void;
    set(name: string, value: unknown): void;
}
export interface Observable {
    set(...args: [option: Record<string, unknown>] | [name: string, value: unknown] | [name: string]): void;
}
```
