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kotlinlang

What's the difference between :
```
interface BasePresenter&lt;in T : BaseView&gt; {
    fun attachView(view: T)
}
```

And
```
interface BasePresenter&lt;T&gt; {
    fun attachView(view: T)
```

when u specify `in:` for generic it means that you  need to pass it as a parameter for any function but you cannot use that to return any value of the type specified to function


where as when you just add `T` you can use the type as a parameter as well as return type to any function

<https://kotlinlang.org/docs/tutorials/kotlin-for-py/generics.html#variance>
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