title: DataSnapshot manual creation
body: <p>DataSnapshot is always associated with firebase listeners, but I'm developing an app that queries the whole database on time basis, so I thought I can solve this problem by manually creating DataSnapshot instance but I can't find how to create. I tried this but it didn't work.</p>
  
  <pre><code>DataSnapshot snapshot = new DataSnapshot(); 
  </code></pre>
  
  <p>so I wanna know is it even possible?</p>