 
     /**
      * Maps `Observable`'s value if the `Result` is `.success` while ignoring `Error` accompanied with `.failure`.
-     * - parameter transform: prdel
+     * - parameter transform: closure to use when transforming value
+     * - returns: `Observable` of type `Result` and its `.success` values transformed using the passed closure
      * ## Example
      * ```
      * httpObservable.mapValue { response in


    /**
     * `Result` equivalent of `Observable`'s `flatMapLatest` only affecting `.success` value.
     * - NOTE: See `mapValue(_:)` and [FlatMap operator](http://reactivex.io/documentation/operators/flatmap.html).
     */
    public func flatMapLatestValue<O>(_ selector: @escaping (E.Value) -> O) -> Observable<Result<O.E, E.Error>> where O : ObservableConvertibleType {


    /**
     * Maps `Observable`'s error if the `Result` is `.failure` while ignoring value accompanied with `.success`.
     * - parameter transform: closure to use when transforming error
     * - returns: `Observable` of type `Result` and its `.failure` errors transformed using the passed closure
     * ## Example
     * ```
     * httpObservable.mapError { error in
