Re: Harmony modules feedback

First, there are two things you might mean by "piece of code".  One is
"the source code for a library/script", which is necessarily
identified by a URL on the Web (perhaps by a filename in other
contexts, like Node).  That stays as a string in every design.  The
other is "a library that I know I have available", and that we're not
using strings for.   Instead, you refer to modules by name, just like
variables are referred to by name in JS.