Go to definition for class members hidden with Symbols takes to symbol itself

As a developer working with Custom Elements classes that have their class members available in runtime, I would like to use Symbol to hide internal methods and properties from the public API.

The drawback of this approach is that "go to definition" currently does not recognise the case when Symbol is used for a method, and jumps to the place where the Symbol itself is defined.

I'm not sure whether this is a bug or feature.

TypeScript Version: 3.8.0-dev.20191126

Search Terms: Go to definition, ECMAScript Symbols, Symbol

Code

const method = Symbol('method');

class Parent {
    protected [method]() {
        return 'parent';
    }
}

class Child extends Parent {
    protected [method]() {
        return super[method]() + ' child';
    }
}

Expected behavior:

When clicking on super[method], it should be possible to go to the line 4.

Actual behavior:

When clicking on super[method], go to definition moves to the line 1.

Playground Link: https://www.typescriptlang.org/play/?ts=3.8.0-dev.20191126&ssl=1&ssc=1&pln=38&pc=2#code/MYewdgzgLgBAtgUygCxAExgXhgZQJ5wBGIANgBQDkiK6FAlANwBQTwJAhhBDAArsBOCMLADeTGBJgAHfiCgJg8jAG1qqNAF0ydGGMn6YgqAFd+YGBSkChUCs30BfJk9YcuMAMLIAliQwIAD3kwNG4+QWFdcUkZOQUlGFUkdS0dPQMJI1NzCGMpBH4kmk1tGABqCxhgHz87aIknJyA

Related Issues:

I didn't found any related issue but the approach with using ES2015 Symbols was suggested to be used as a workaround for protected methods in mixins at https://github.com/microsoft/TypeScript/issues/17744#issuecomment-431534647

Bắt đầu với TypeScript playground được liên kết và tái hiện go-to-definition trên super[method] trong các lớp Parent và Child được cung cấp. Truy vết điểm vào của language service dành cho các thành viên symbol được tính toán; hoàn tất khi điều hướng đến phương thức Parent ở dòng 4 thay vì khai báo Symbol ở dòng 1.