title: How to create Cascade multiple Select List custom field?
body: <p>I need to create a field as a cascade select list field like the default provided in JIRA but with slight differences. It will appear in screen as shown below:</p>
  
  <pre><code>FIELD NAME: &lt;drop downlist 1&gt; &lt;drop downlist 2&gt; &lt;drop downlist 1&gt; &lt;drop downlist 2&gt; &lt;drop downlist 1&gt; &lt;drop downlist 2&gt;
  </code></pre>
  
  <p>There is no parent-child relationship between dropdown list 1 and dropdown list 2. It is just repeating in three pairs as above.</p>
  
  <p>Can anyone please suggest to me,</p>
  
  <ol>
  <li>Which type of custom field type I should choose to create this plugin?</li>
  <li>In admin configuration mode, how would I be able to configure two dropdown lists?</li>
  <li>Some approach or examples which can help me to achieve this?</li>
  </ol>
  
  <p>The actual lists are as shown below:</p>
  
  <p>   </p>
  
  <p>So if I were to keep - month list as a static and year list is configurable from the admin side, will it work if I choose to extend - <code>AbstractCustomFieldType&lt;Map&lt;String, Option&gt;, Option&gt;</code>
  OR 
  if I suppose to go with this - <code>AbstractSingleFieldType&lt;Option&gt;</code> then I am afraid it may not get fail with multiple list as the year list will have three copies of the same list and can be selectable with different values.  </p>
  
  <p>Any suggestions?</p>
  
  <p>Thank You</p>