title: Glide Image request : Does downloadOnly check the cache before downloading only?
body: <p>I am making a request like below, but i want to know if downloadOnly checks the cache for the image first? </p>
  
  <pre><code>FutureTarget&lt;File&gt; future = Glide.with(applicationContext)
      .load(yourUrl)
      .downloadOnly(500, 500);
  File cacheFile = future.get();
  </code></pre>
  
  <p>My main issue is that the image in yourUrl is already loaded in the cache, and i need a synchronous way to retrieve the image from the cache in a background thread.</p>
  
  <p>The code above works, but i need to know if there is a cache check before downloadOnly. Thanks.</p>