title: How to organize the data of type `List<List<String>>`
body: <p>I have a <code>List&lt;List&lt;String&gt;&gt;</code> from <code>Map&lt;String, dynamic&gt;</code>.</p>
  <p><strong>Here is the code of <code>List&lt;List&lt;String&gt;&gt;</code></strong><br>
  tab is an object of type Tablet Class.</p>
  <pre><code>Map&lt;String, dynamic&gt; demo = {'Uses': [tab.usesTitle, tab.usesBody], 'Safety Advices': [tab.safetyAdvTitle, tab.safetyAdvBody]};
  </code></pre>
  <p><strong>Tablet Object</strong></p>
  <pre><code>Tablet tab = Tablet(
      usesTitle:  ['Pain Relief', 'Fever'],
      usesBody:  ['Pain Relief Details.....', 'Fever Details.....'],
      safetyAdvTitle:  ['Alcohol','Kidney' ],
      safetyAdvBody:  ['Alcohol Details...', 'Kidney Details...'],
  );
  </code></pre>
  <p><strong>What I Tried</strong><br></p>
  <pre><code>demo.forEach((k, v){
      v.forEach((y){
        print(y.join('\n'));
      });
  });
  </code></pre>
  <p><strong>Current Output</strong></p>
  <pre><code>Uses
  Pain Relief
  Fever
  Pain Relief Details.....
  Fever Details.....
  Safety Advices
  Alcohol
  Kidney
  Alcohol Details...
  Kidney Details...
  </code></pre>
  <p><strong>I Want Like this</strong></p>
  <pre><code>Uses
  Pain Relief
  Pain Relief Details.....
  Fever
  Fever Details.....
  
  Safety Advices
  Alcohol
  Alcohol Details...
  Kidney
  Kidney Details...
  </code></pre>
  <blockquote>
  <blockquote>
  <p>Actually It's demo So just printing values. In real World, I am going to use <code>Widgets</code>. So At that time <code>forEach</code> <a href="https://stackoverflow.com/questions/58571536/flutter-how-to-list-out-foreach-value-in-listview-builder">won't work</a>. So solution without <code>forEach</code> needed.</p>
  </blockquote>
  </blockquote>
  <p><strong>Updated</strong><br>
  I can do the functionality of drop-down but the <code>Text()</code> widgets are aligned one by one should be in this order.<br>
  Below this one more card with <strong>Safety Advices</strong> with same design.
  <a href="https://i.stack.imgur.com/SS3rj.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/SS3rj.png" alt="Image" /></a></p>