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kotlinlang

Hi guys.

I have an issue about `RecyclerView.Adapter&lt;&gt;()`.

I am trying to pass the `List` size to the `getItemCount()`

`override fun getItemCount() = vibes.vibeList?.size`

But there is an error when I using `nullable` variable because the return type is `Int?`
`Return type of 'getItemCount' is not a subtype of the return type of the overridden member 'public abstract fun getItemCount(): Int defined in android.support.v7.widget.RecyclerView.Adapter'`

May I know how to get rid of this issue?