function objToRoute(obj: any): Route {
   // convert it to route and return
}

const routes: Routes = [
   path: '',
   component: SomeComponent,
   children: [
      objToRoute(specialObject),
      {
                path: '**',
                component: StubComponent
      }
   ]
]

@NgModule({
    imports: [RouterModule.forChild(routes)],
    exports: [RouterModule]
})
export class SomeRoutingModule {}

function objToRoute(obj: any): Route {
   return obj;
}

const routeObj: Route = {
    path: 'somePath',
    pathMatch: 'full',
    loadChildren: () => import('pathToDir/someLazy.module').then(m => m.SomeLazyModule)
}

const routes: Routes = [
   path: '',
   component: SomeComponent,
   children: [
      objToRoute(routeObj),
      {
                path: '**',
                component: StubComponent
      }
   ]
]

@NgModule({
    imports: [RouterModule.forChild(routes)],
    exports: [RouterModule]
})
export class SomeRoutingModule {}