title: Where are fetch() and FormData() defined?
body: <p>I'm using react-native and <a href="http://standardjs.com/" rel="noreferrer">standardjs</a>.</p>
  
  <p>Standard reports that both <code>fetch</code> and <code>FormData</code> are undefined when I use them, which is true.  However, I can't figure out where either of these symbols are defined.  I can't seem to import them from either react or react-native modules.</p>
  
  <p>What import statement should I use to import <code>fetch</code> and <code>FormData</code>?</p>