Support either type asserting `self` in classes, or properly ignoring workaround

I currently have a scenario very similar to https://github.com/microsoft/TypeScript/issues/2000#issuecomment-546929745. While it would be fixed it TS natively supported overriding class methods (see that issue), I followed the outline of the linked comment, but am running into a small issue. This is not a huge blocker but rather a nice-to have to get proper type completion for my scenario.

export class WritableObjStream<T> extends (stream.Writable as any) {
    writableObjectMode: true

    write(object: T, cb?: (error: Error | null | undefined) => void): boolean {
        return super.write(...more details)
    }
}

Because we type assert the base class to any, TS has no knowledge of the superclass. I tried a few solutions, with errors included below:

(super as any).write() // 'super' must be followed by an argument list or member access.

let s: stream.Writable = undefined;
// @ts-ignore
s = super // Identifier expected.

return s.write() // 'super' must be followed by an argument list or member access, Expected 1-3 arguments, but got 0.

Luckily, it autocomplete is picking up on the proper type of s.write() now and giving me an argument error.
Also, from what I can gather super is treated as a keyword not an identifier, which results in the error above.

This may not be the most common of errors, but there may be a few scenarios/other use cases. I tried writing a few examples up but none made real-world sense besides this use-case of a workaround for overriding methods.

Bắt đầu với ví dụ về class trong issue và issue/comment TypeScript được liên kết mô tả workaround. Điều tra cách TypeScript phân tích cú pháp và kiểm tra kiểu của super trong kịch bản này, sau đó xác định liệu việc type-assert self có nên được hỗ trợ hay workaround nên bị từ chối một cách rõ ràng. Hoàn tất khi hành vi được chọn được ghi nhận bằng các test bao quát những ví dụ đã nêu.