e.editable.overrideItems</code> is set to <code>true</code>.
  </p>

<pre class="prettyprint lang-js">
var items = new vis.DataSet([
  {id: 1, content: 'read-only item', start: '2013-04-20', editable: false},
  {id: 2, content: 'editable item', start: '2013-04-14'}
]);
</pre>

  <p>
    Individual manipulation actions (<code>updateTime</code>, <code>updateGroup</code> and <code>remove</code>) can also be set on individual items. If any of the item-level
    actions are specified (and <code>overrideItems</co