title: Best way to define a Map Object in GraphQL Schema?
body: <p>I try to map a key string with arrays of Objects.</p>
  
  <p>I can create a simple Object but i want to add easily an object in these arrays. The Map Object is perfect to do this.</p>
  
  <p>Problem: I dont know how to define the Type Map for GraphQL :'(</p>
  
  <pre class="lang-js prettyprint-override"><code>@ObjectType()
  export class Inventaire
    @Field()
    _id: string;
  
   @Field()
    stocks: Map&lt;string, Article[]&gt;;
  }
  </code></pre>