title: Shopify mobile-buy-sdk-android migration to 4.0.0 from 3.2.3
body: <p>Currently, I am using  <strong>mobile buy SDK</strong> version <code>3.2.3</code> and my code is:</p>
  
  <pre><code>QueryGraphCall graphCall = graphClient.queryGraph(graphqlQuery.getAllOrders(size, cursor));
      graphCall.enqueue(new GraphCall.Callback&lt;Storefront.QueryRoot&gt;() {
          @Override
          public void onResponse(@NonNull GraphResponse&lt;Storefront.QueryRoot&gt; response) {
          // Success response
          }
          @Override
          public void onFailure(@NonNull GraphError error) {
          //Failure Response
          }
      });
  </code></pre>
  
  <p>Updated my shopify version to <code>4.0.0</code> and now it shows can not resolve symbol <code>GraphCall.Callback</code> 
  I am new to shopify, Can anybody help me to this problem</p>
  
  <ul>
  <li>How can I get response from latest version of mobile buy SDK?</li>
  <li>Is there any problem with my SDK update ( just change <code>implementation 'com.shopify.mobilebuysdk:buy3:3.2.3</code> >> <code>4.0.0</code> ) version 4X does not supports <code>minSdkVersion 19</code> so also changed the same to 21.</li>
  </ul>
  
  <p>Thanks in advance</p>