@Override
    public ByteBuf serializeRequestAsBinary(final RequestMessage requestMessage, final ByteBufAllocator allocator) {
        throw new UnsupportedOperationException("text/plain does not produce binary");
    }
A highly use-case specific serializer that only has context for HTTP where results simply need to be converted
to string in a line by line fashion for text based returns.
gremlin-server/src/main/java/org/apache/tinkerpop/gremlin/server/util/TextPlainMessageSerializer.java