Response Resource in kotlin

Resource.kt

sealed class Resource<T>(
       val data: T? = null,
       val message: String? = null
    ) {
       class Success<T>(data: T) : Resource<T>(data)
       class Loading<T>(data: T? = null) : Resource<T>(data)
       class Error<T>(message: String, data: T? = null) : Resource<T>(data, message)
    }