title: Filter and sort records from Hive box in Flutter
body: <p>Im using Hive with Flutter to store contacts with key as alphanumeric string, each contact data is a map with timestamp in it</p>
  <p>Box Rows =</p>
  <pre><code>Key.     =&gt; Value  
  'abc123' =&gt; {'name': 'JK', 'country':'GB', 'timestamp': '568'},
  'etergb' =&gt; {'name': 'FS', 'country':'DE', 'timestamp': '425'}
  '546hfg' =&gt; {'name': 'TD', 'country':'GB', 'timestamp': '687'}
  </code></pre>
  <p>Now is it possible to filter these with <strong>where country=GB</strong> condition and sort the rows by map.item.timestamp ASC/DESC</p>