Method add

/**
 * Add recipients to the email.
 *
 * @param   mixed   $recipient  Either a string or array of strings [email address(es)]
 * @param   mixed   $name       Either a string or array of strings [name(s)]
 * @param   string  $method     The parent method's name.
 *
 * @return  Mail|boolean  Returns this object for chaining on success or boolean false on failure.
 *
 * @since   1.7.0
 *
 * @throws  \InvalidArgumentException if the argument array counts do not match
 * @throws  phpmailerException  if setting the address failed and exception throwing is enabled
 */
protected function add($recipient, $name = '', $method = 'addAddress')
{
    $method = lcfirst($method);
    // If the recipient is an array, add each recipient... otherwise just add the one
    if (\is_array($recipient)) {
        if (\is_array($name)) {
            $combined = array_combine($recipient, $name);
            if ($combined === false) {
                throw new \InvalidArgumentException("The number of elements for each array isn't equal.");
            }
            foreach ($combined as $recipientEmail => $recipientName) {
                $recipientEmail = MailHelper::cleanLine($recipientEmail);
                $recipientName = MailHelper::cleanLine($recipientName);
                // Check for boolean false return if exception handling is disabled
                if (\call_user_func('parent::' . $method, $recipientEmail, $recipientName) === false) {
                    return false;
                }
            }
        } else {
            $name = MailHelper::cleanLine($name);
            foreach ($recipient as $to) {
                $to = MailHelper::cleanLine($to);
                // Check for boolean false return if exception handling is disabled
                if (\call_user_func('parent::' . $method, $to, $name) === false) {
                    return false;
                }
            }
        }
    } else {
        $recipient = MailHelper::cleanLine($recipient);
        // Check for boolean false return if exception handling is disabled
        if (\call_user_func('parent::' . $method, $recipient, $name) === false) {
            return false;
        }
    }
    return $this;
}