How to research/build Proxy Walker? I'm having a hard time understanding what I need to do to build a Proxy Walker (I have a licence to build one).  Is this something I need to use fragments to research?  Or does having a licence allow me to build it automatically?

If it is something I need to research with fragments which tree/path do I need to take?  I'm having  a hard time finding resources on this and not sure if this was something previously known at this point?