title: What to import to use IOUtils.toString()?
body: <p>I am trying to use IOUtils.toString() to read from a file.
  However, I am getting an error saying "IOUtils cannot be resolved."</p>
  
  <p>What am I supposed to be importing to allow me to use this function?</p>
  
  <pre><code>String everything = IOUtils.toString(inputStream);
  </code></pre>
  
  <p>Thanks</p>