sealed class Result<out T : Any> {

    data class Success<out T : Any>(val data: T) : Result<T>()
    data class Error(val exception: Throwable) : Result<Nothing>()

    override fun toString(): String {
        return when (this) {
            is Success<*> -> "Success[data=$data]"
            is Error -> "Error[exception=$exception]"
        }
    }
}

interface ApiRx {

    @GET("/define")
    fun getDefinetion(@Query("term") word: String): Single<Result<BaseResponse>>

}

class UrbanDataSourceRx(val apiRx: ApiRx, val mainApiRx: MainApiRx) {

    fun definition(word: String): Result<BaseResponse> {
        return apiRx.getDefinetion(word)
		// How to convert Single -> Result<BaseResponse> ????
		// .blockingGet() without using it.

    }
}