Kotlin Result flatMap

ResultExt.kt

inline fun <R, T> Result<T>.flatMap(transform: (value: T) -> Result<R>): Result<R> {
    return when {
        isSuccess -> {
            assert(this.getOrNull() != null)
            transform(this.getOrNull()!!)
        }
        else -> {
            assert(this.exceptionOrNull() != null)
            Result.failure(this.exceptionOrNull()!!)
        }
    }
}