src/MimeMailer/MimeMessage.php
public function setBcc($mail = '', $name = null)
    {
        $this->bcc = Helper::deduplicate(
            array_merge($this->bcc, call_user_func_array(array('\MimeMailer\Helper', 'checkPeopleArgs'), func_get_args()))
        );
        return $this;
    }
public function setBcc($mail = '', $name = null)
    {
        $this->bcc = Helper::deduplicate(
            array_merge($this->bcc, call_user_func_array(array('\MimeMailer\Helper', 'checkPeopleArgs'), func_get_args()))
        );
        return $this;
    }
Set Bcc field

@param string/array $mail The email address to add, or an array of name=>email pairs
@param string/bool $name The name to show for the email address if there is just one
@return self
@see \MimeMailer\MimeEmail::checkPeopleArgs