@Override
    public HttpPostMultipartRequestDecoder offer(HttpContent content) {
        checkDestroyed();

        // Maybe we should better not copy here for performance reasons but this will need
        // more care by the caller to release the content in a correct manner later
        // So maybe something to optimize on a later stage
        ByteBuf buf = content.content();
        if (undecodedChunk == null) {
            undecodedChunk = buf.copy();
        } else {
            undecodedChunk.writeBytes(buf);
        }
        if (content instanceof LastHttpContent) {
            isLastChunk = true;
        }
        parseBody();
        if (undecodedChunk != null && undecodedChunk.writerIndex() > discardThreshold) {
            undecodedChunk.discardReadBytes();
        }
        return this;
    }