interface function member declarations needing parameter attributes ?

[someone]

```d
public interface intefaceWhatever {

    public bool doSomething(
       dstring lstrID,
       classX robjX
       );

}
```

vs

```d
public interface intefaceWhatever {

    public bool doSomething(
       const dstring lstrID,
       ref classX robjX
       );

}
```

 From the interface perspective: are these signatures identical or 
not ?

Is the latter needed ... or if not, makes sense as best practice ?