public function expectsOutcome(
        IOutcomeRule $rule,
        IOutcomeRule $rule2 = null,
        IOutcomeRule $rule3 = null,
        IOutcomeRule $rule4 = null,
        IOutcomeRule $rule5 = null,
        IOutcomeRule $rule6 = null,
        IOutcomeRule $rule7 = null,
        IOutcomeRule $rule8 = null,
        IOutcomeRule $rule9 = null,
        IOutcomeRule $rule10 = null
    )
    {
        foreach (func_get_args() as $arg) {
            if ($arg instanceof IInputRule) {
                $this->outcomeRules[] = $arg;
            }
        }

        return $this;
    }