I find the "implementation" code lens feature very useful and I am looking forward to #136282.

Since TypeScript has no "virtual" keyword to explicitly state that a method can and should be overridden, it is not possible to know if a method is overridden in a derived class.

I have an abstract class A with the methods foo() and bar().
class B extends A and overrides foo().
class C extends A and does not override foo().

Looking at a parent class, I'd like to see if a method is overridden in a derived class and quickly navigate there.
The "implementation" code lens should basically display the result of "Find All Implementation" command.