title: Polymer Element Project with multiple elements
body: <p>I'm trying out Polymer 3.0 for the first time, and I want to build an Element library that is expected to have about 20 components. I followed the guide for creating an Element project from <a href="https://polymer-library.polymer-project.org/3.0/docs/tools/create-element-polymer-cli" rel="nofollow noreferrer">the documentation</a> and selecting <code>polymer-3-element</code> from the <code>polymer init</code> menu. However, the set up that the tool generates seems to be designed only for a single component. How can I extend this setup so that I can bundle and test multiple components?</p>