ResultApi3.kt

  override fun enqueue(callback: Callback<Result<T>>) {
        delegate.enqueue(
            object : Callback<T> {
                override fun onResponse(call: Call<T>, response: Response<T>) {
                    if (response.isSuccessful) {
                        callback.onResponse(
                            this@ResultCall,
                            Response.success(
                                response.code(),
                                Result.success(response.body()!!)
                            )
                        )
                    } else {
                        callback.onResponse(
                            this@ResultCall,
                            Response.success(
                                Result.failure(
                                    HttpException(response)
                                )
                            )
                        )
                    }
                }

                override fun onFailure(call: Call<T>, t: Throwable) {
                    val errorMessage = when (t) {
                        is IOException -> "No internet connection"
                        is HttpException -> "Something went wrong!"
                        else -> t.localizedMessage
                    }
                    callback.onResponse(
                        this@ResultCall,
                        Response.success(Result.failure(RuntimeException(errorMessage, t)))
                    )
                }
            }
        )
    }