How to import commonMain classes into Angular (ts) app?

I have a Kotlin/MP project with a java backend and typescript (Angular) frontend.

My commonMain source has classes defined like this:

package com.mydomain.myapp.common.mapthings

@JsExport
class DisplayLayer {
    ...
}

When I build, it creates a js/ts library like this:

build/js/packages/myapp/kotlin/myapp.d.ts
build/js/packages/myapp/kotlin/myapp.js
build/js/packages/myapp/kotlin/myapp.js.map

To date, I've been importing this library into my Angular components like this:

import * as myapp_top from "myapp";
import myapp_common = myapp_top.com.mydomain.myapp.common;
import DisplayLayer = myapp_common.mapthings.DisplayLayer;

This works just fine.  Behind the scenes, it's importing the entire common library into every component but Angular takes care that it is included only once in the generated main.js file.

I'm now trying to break my Angular app into lazily-loaded modules and background worker threads.  The result is that the full common library is included in the base app even if any given module needs only part of it.  Worse is that the entire library gets included inside every generated worker.js file even if only a single class is needed from it.

What is the proper way to import individual classes from the generated common library?

-- Brian