Swift_Mime_SimpleMimeEntity::setEncoder PHP Method

    public function setEncoder(Swift_Mime_ContentEncoder $encoder)
    {
        if ($encoder !== $this->encoder) {
            $this->clearCache();
        }
        $this->encoder = $encoder;
        $this->setEncoding($encoder->getName());
        $this->notifyEncoderChanged($encoder);
        return $this;
    }