ByteBufProxy is in src/test?

Note that [DirectBufferProxy](https://github.com/lmdbjava/lmdbjava/blob/master/src/main/java/org/lmdbjava/DirectBufferProxy.java) is in src/main but [ByteBufProxy](https://github.com/lmdbjava/lmdbjava/blob/master/src/test/java/org/lmdbjava/ByteBufProxy.java) is in src/test. Is this a bug? Are Netty ByteBufs not officially supported?