public bool CanCreateInvocationDelegateFor(MethodInfo serviceMethod)
		{
			return
				serviceMethod.ReturnType == typeof(Task) && serviceMethod.IsAsyncCallable() && !serviceMethod.IsStatic &&
				(serviceMethod.NumberOfParameters() == 1 ||
				(serviceMethod.NumberOfParameters() == 2 && serviceMethod.TypeOfSecondParameter() == typeof(CancellationToken)));
		}
		private static bool IsSingleParameterWithOptionalCancellationToken(MethodInfo method)
		{
			return
				method.NumberOfParameters() == 1 ||
				(method.NumberOfParameters() == 2 && method.TypeOfSecondParameter() == typeof(CancellationToken));
		}