title: Graphql java nested query resolver
body: <p>I have requirements graph nested query with java resolver.</p>
  
  <pre><code>getAccounts(type: "01",transactionMonths: 12){
           accountNumber,
            openDate,
            productType,               
            accountTransactions(annualFee: True){
              amount,
              date
                  }
        }
  </code></pre>
  
  <p>How can we write query in graphql and how to write java resolver  for nested query.
  How to fetch the nested query arguments to to pass to my jparepository.
  i have Account type and Transactions type as below</p>
  
  <pre><code>type Account{
      accountNumber: String
      openDate: String
       type: String
       transactionMonths: String
       productType: String
       accountTransactions:[AccountTransaction]
  }
  type AccountTransaction{
      amount: String
      date:String
      annualFee:Boolean
  }
  </code></pre>
  
  <p>How can i retrive the accountTransactions in accounts using nested query using java resolver.</p>