UNUSED_METHOD_ARGUMENT is triggered with a function argument

[jtorz]

For example:

public string function myFunction(function doSomething){
    return doSomething();
}

UNUSED_METHOD_ARGUMENT: Argument dosomething is not used in function. Consider removing it.

[KamasamaK]

I have confirmed that the example given above incorrectly reports the UNUSED_METHOD_ARGUMENT issue.

However, I have found that it does not report that issue when including the scope as below:

public string function myFunction(function doSomething){
    return arguments.doSomething();
}