Im trying to implement diffutil in my adapter and im getting the following error:

One type argument expected for class Result<out T>

This is the code where i get the error:

private val diffCallback = object: DiffUtil.ItemCallback<Result>() {

}

This is my Result class:

data class Result(
    val adult: Boolean,
    val backdrop_path: String,
    val genre_ids: List<Int>,
    val id: Int,
    val media_type: String,
    val original_language: String,
    val original_title: String,
    val overview: String,
    val popularity: Double,
    val poster_path: String,
    val release_date: String,
    val title: String,
    val video: Boolean,
    val vote_average: Double,
    val vote_count: Int
)

I don't understand,this is exactly how i do this every time,and it works without problems