phake\OptionParser::set_option_value PHP Method

    protected function set_option_value($option, $value)
    {
        if (is_array($this->options[$option])) {
            $len = count($this->options[$option]);
            $this->options[$option][$len - 1] = $value;
        } else {
            $this->options[$option] = $value;
        }
    }