title: How to solve the collision of TAB key mapping of `UltiSnips` plugin in the Vim
body: <p>I've set the mapping keys as follows:</p>
  
  <pre><code>" Easy indent for code blocks
    nmap &lt;tab&gt;      v&gt;
    nmap &lt;s-tab&gt;    v&lt;
    vmap &lt;tab&gt;      &gt;gv
    vmap &lt;s-tab&gt;    &lt;gv
  </code></pre>
  
  <p>That works good. But, when I installed <code>UltiSnips</code> by vundle, the Tab key does't work as indent action, it will remove multi-line codes which I selected. I know this is because the default setting of <code>UltiSnips</code>. I would like to remain the Tab mapping for <code>UltiSnips</code> to trigger its functions, How do I solve the problem of using the TAB key to indent code blocks? Thanks!</p>