Angular HttpResponse expected not lib.dom

[ghost]

// Example

  get(reqInfo: RequestInfo) {
    if (reqInfo.query.has('page')) {
      const page: number = Number.parseInt(reqInfo.query.get('page')[0], 10);
      const limit: number = reqInfo.query.has('limit') ?
        Number.parseInt(reqInfo.query.get('limit')[0], 10)
        : 10;
      const startIndex = page * limit;
      const collection = this.news.slice(startIndex, startIndex + limit);
      const body = reqInfo.utils.getConfig().dataEncapsulation ? {data: collection} : collection;
      const httpResponse = new HttpResponse({
        body,
        url: reqInfo.url,
        status: 200,
        statusText: 'ok'
      });
      return of(httpResponse);
    }
    return null;
  }

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