/// <summary>
/// Returns a collector that can be used to create a ValueWithFailure instance from a stream of ValueWithFailure
/// instances.
/// <para>
/// The <seealso cref="Collector"/> returned performs a reduction of its <seealso cref="ValueWithFailures"/> input elements under a
/// specified <seealso cref="BinaryOperator"/> using the provided identity.
///
/// </para>
/// </summary>
/// @param <T> the type of the success value in the <seealso cref="ValueWithFailures"/> </param>
/// <param name="identityValue"> the identity value </param>
/// <param name="operator"> the operator used for the reduction. </param>
/// <returns> a <seealso cref="Collector"/> </returns>
//JAVA TO C# CONVERTER WARNING: Java wildcard generics have no direct equivalent in .NET:
//ORIGINAL LINE: public static <T> java.util.stream.Collector<ValueWithFailures<T>, ?, ValueWithFailures<T>> toValueWithFailures(T identityValue, java.util.function.BinaryOperator<T> operator)
public static Collector <ValueWithFailures <T>, ?, ValueWithFailures <T> > toValueWithFailures <T>(T identityValue, System.Func <T, T, T> @operator)
{
System.Func <ValueWithFailures <T>, ValueWithFailures <T>, ValueWithFailures <T> > reduceFunction = (result1, result2) => result1.combinedWith(result2, @operator);
return(Collectors.reducing(ValueWithFailures.of(identityValue), reduceFunction));
}