@delon/cli/application/other-files/core/module-import-guard.ts

Schematics for ng-alain

// https://angular.io/guide/styleguide#style-04-12
export function throwIfAlreadyLoaded(parentModule: any, moduleName: string) {
  if (parentModule) {
    throw new Error(`${moduleName} has already been loaded. Import Core modules in the AppModule only.`);
  }
}