Remoting Runtime Psuedo code

libraries.ts

type Libraries = any;
type Remoting = any;
export interface LibrariesViewModel {
  list(): Libraries[];
}

class LibrariesImpl implements LibrariesViewModel {
  public list(): Libraries[] {
    return [
      'lib1',
      'lib2',
    ];
  }
}

class LibrariesRemoteImpl implements LibrariesViewModel {

  constructor(
    private baseLibraries: LibrariesViewModel, 
    private remoting: Remoting
  ) { }

  public list(): Libraries[] {
    const remote = this.remoting.getRemoteLibraries();
    return [
      ...remote,
      ...this.baseLibraries.list(),
    ];
  }
}