How to display node teaser in Display Suite custom field? I am trying to create custom Display Suite code field.

I would like to show truncated text of node body or teaser if exists (+ other stuff, like: (...) and link to current node)

I tried to use [node:teaser] but nothing was showed.
I tried to use [node:body:?] token too, but all options I have tried failed for me.

Field code:

[node:teaser] (...) &lt;a class="read-more" href="[node:url]"&gt;&lt;?php print t('read more'); ?&gt;&lt;/a&gt;


Any suggestions? 

It so basic thing but I have no idea what I am doing wrong here...
I did this by adding a preprocess field which then becomes available in DS.

&lt;?php
      function MYTHEME_preprocess_node(&amp;$variables) {
        // Get the summary as a discrete field.
        $body = array_pop(field_get_items('node', $variables['node'], 'body'));
        $variables['node_summary'] = $body['safe_summary'];
      }


Then in display suite add a preprocess field named node_summary.