title: convert a list of strings to list of type dynamic
body: <p>Im trying to use a MultiSelectFormField to create a drop down list with multiple choices.The datasource for the MultiSelectFormField is required in the below format,</p>
  <pre><code>                 dataSource:[
                                {
                                  &quot;display&quot;: &quot;Running&quot;,
                                  &quot;value&quot;: &quot;Running&quot;,
                                },
                                {
                                  &quot;display&quot;: &quot;Climbing&quot;,
                                  &quot;value&quot;: &quot;Climbing&quot;,
                                },
                                {
                                  &quot;display&quot;: &quot;Walking&quot;,
                                  &quot;value&quot;: &quot;Walking&quot;,
                                },
                              ],
  </code></pre>
  <p>but what I have is a list of type string containing the value sthat should be displayed in the drop down.My question is how can I convert</p>
  <pre><code>list&lt;String&gt; dropDownValues=[&quot;Running&quot;,&quot;Climbing&quot;,&quot;Walking&quot;]
  </code></pre>
  <p>to the format required</p>