How can I hide my plugin source code?

I would like to design a template embedded in the engine for others to use, but do not expose my source.
so I create a plugin, but the source code is exposed.

111137-qq截图20161016232618.png

How to hide it?
I read the document in web that description of plugins.

I find I saw such a word.

So,I think that hide plugin code is feasible.
Thanks for any help!

Have you find an answer?

The only (weak) option at the moment
is obfuscation and letting your
blueprint/material graphs look like
spaghetti madness from hell.
Maybe that guy was right)))