src/Email/SwiftEmail.php
public function setBcc(array $addresses): Email
    {
        $addresses = $this->transformAddressesToArray($addresses);
        $this->message->setBcc($addresses);

        return $this;
    }
public function setBcc(array $addresses): Email
    {
        $addresses = $this->transformAddressesToArray($addresses);
        $this->message->setBcc($addresses);

        return $this;
    }
public function setBcc ( array $ addresses ) : Email { $ addresses = $ this -> transformAddressesToArray ( $ addresses ) ; $ this -> message -> setBcc ( $ addresses ) ; return $ this ; }
Set the Bcc addresses.

Recipients set in this field will receive a 'blind-carbon-copy' of this message.

@param Address[] $addresses

@return self
Set the Bcc addresses .