title: How to use whereIn filter multiple times in a query
body: <p>I am using this code to retrive data from firestore</p>
  <pre><code>querysnap = FirebaseFirestore.instance
                                .collection(&quot;datas&quot;)
                                .where(&quot;cat&quot;, whereIn: Cateogryarray )
                                .where(&quot;City&quot;, whereIn:Cityarray)
                                .snapshots();
  </code></pre>
  <p>Then I get this error.</p>
  <blockquote>
  <p>You cannot use 'whereIn' filters more than once.</p>
  </blockquote>
  <p>How can I execute this query.</p>