Swift_Mime_SimpleMimeEntity::bodyToByteStream PHP Method

    protected function bodyToByteStream(Swift_InputByteStream $is)
    {
        if (empty($this->immediateChildren)) {
            if (isset($this->body)) {
                if ($this->cache->hasKey($this->cacheKey, 'body')) {
                    $this->cache->exportToByteStream($this->cacheKey, 'body', $is);
                } else {
                    $cacheIs = $this->cache->getInputByteStream($this->cacheKey, 'body');
                    if ($cacheIs) {
                        $is->bind($cacheIs);
                    }
                    $is->write("\r\n");
                    if ($this->body instanceof Swift_OutputByteStream) {
                        $this->body->setReadPointer(0);
                        $this->encoder->encodeByteStream($this->body, $is, 0, $this->getMaxLineLength());
                    } else {
                        $is->write($this->encoder->encodeString($this->getBody(), 0, $this->getMaxLineLength()));
                    }
                    if ($cacheIs) {
                        $is->unbind($cacheIs);
                    }
                }
            }
        }
        if (!empty($this->immediateChildren)) {
            foreach ($this->immediateChildren as $child) {
                $is->write("\r\n\r\n--" . $this->getBoundary() . "\r\n");
                $child->toByteStream($is);
            }
            $is->write("\r\n\r\n--" . $this->getBoundary() . "--\r\n");
        }
    }