title: How to define a type with list of java.util.objects in graphql-java
body: <p>I have a schema where the json can have a list of Int and Strings as values. I am wondering how to define a type of resolver for my scenario. </p>
  
  <pre><code>type Total {
    key: String
    values: [Object]
  }
  
  type Query {
    filter (key : String!) : Total
  }
  </code></pre>