title: Where to import (export?) a module using forRoot?
body: <p>I'm using <code>ng2-bootstrap</code>, and importing <code>ModalModule.forRoot()</code> to accomplish modal usage. I'm following the Angular style guide as best I know how. I have a need to use modals in more places in my app than I did before, and I'm trying to move the import out to a more global module. The problem is that Angular wont just let me <em>export</em> it from my shared module or my core module because it uses <code>forRoot()</code>. Following best practices, I understand that I shouldn't import it in my <code>AppModule</code>; they say <code>AppModule</code> is more stable if it's kept minimal and is only used for importing CoreModule and bootstrapping the application. So where do I import it?</p>