     
<code class="param-type">string</code>
|

<code class="param-type">function</code>


  
  </td>

  
      <td class="attributes">
      
          &lt;optional><br>
      

      

      
      </td>
  

  
      <td class="default">
      
          "*"
      
      </td>
  

  <td class="description last">A search mask for file names, specified as a string or a function.
A mask string can contain question mark (?) and asterisk (*) wild cards. Default is "*", which matches all file names.
Can also be