How to use the angular-split.AngularSplitModule.forRoot function in angular-split

import { MarkdownKanbanComponent } from './markdown/markdown-kanban/markdown-kanban.component';

@NgModule({
  imports: [
    CommonModule,
    RouterModule,
    FormsModule,
    HttpClientModule,
    ReactiveFormsModule,
    CustomMaterialModule,
    NgxTreeDndModule,
    CalendarCommonModule,
    EcoFabSpeedDialModule,
    FlexLayoutModule,
    FlatpickrModule.forRoot(),
    AngularSplitModule.forRoot(),
    MarkdownModule.forRoot({
      markedOptions: {
        provide: MarkedOptions,
        useValue: {
          gfm: true,
          tables: true
        },
      },
    }),
    MindMapModule
  ],
  declarations: [
    CalendarHeaderComponent,
    DraggableEditableSectionComponent,
    ContentEditableDirective,
    CoordinatesMapComponent,

CheckingComponent,
    CheckingOverviewComponent,
    CheckingQuestionsComponent,
    CheckingTextComponent,
    CheckingAnswersComponent,
    QuestionDialogComponent,
    FontSizeComponent,
    CheckingOwnerComponent
  ],
  imports: [
    CheckingRoutingModule,
    CommonModule,
    SharedModule,
    UICommonModule,
    XForgeCommonModule,
    AngularSplitModule.forRoot()
  ],
  entryComponents: [QuestionDialogComponent]
})
export class CheckingModule {}

GeekDemoComponent,
        DirRtlComponent,
        WorkspaceLocalstorageComponent,
        LazyComponent,
    ],
    imports: [
        BrowserModule,
        RouterModule.forRoot(routes),
        HttpClientModule,
        FormsModule,
        ButtonsModule.forRoot(),
        CollapseModule.forRoot(),
        BsDropdownModule.forRoot(),
        SortableModule.forRoot(),
        TooltipModule.forRoot(),
        AngularSplitModule.forRoot(),
    ],
    providers: [{
        provide: LocationStrategy, useClass: HashLocationStrategy},
        ChangelogService
    ],
    bootstrap: [AppComponent]
})
export class AppModule {}