mageekguy\atoum\mailer::addTo PHP Method

    public function addTo($to, $realName = null)
    {
        if ($this->to !== null) {
            $this->to .= ',';
        }
        if ($realName === null) {
            $this->to .= $to;
        } else {
            $this->to .= $realName . ' <' . $to . '>';
        }
        return $this;
    }