title: Angular 6 ResponseContentType
body: <p>I'm trying to download some xls from my api rest, but to no avail, do I need something to use ResponseContentType?</p>
  
  <pre><code>[ts] O módulo '"/home/dev/Documentos/JAVA-TUDO/SIMPLUS/simplus-cliente/node_modules/@angular/common/http"' não tem nenhum membro exportado 'ResponseContentType'.
  
  
  import ResponseContentType
  import { Injectable } from '@angular/core';
  import { HttpClient, ResponseContentType } from '@angular/common/http';
  import { Product } from '../model/product.model';
  
  @Injectable()
  export class ProductService {
  </code></pre>