caution and only when the caller is
 sure that they are going to erase the <a href="http://d.android.com/reference/android/graphics/Bitmap.html?is-external=true" title="class or interface in android.graphics"><code>Bitmap</code></a> entirely before writing
 new data to it. </p></div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../com/bumptech/glide/load/engine/bitmap_recycle/BitmapPool.html#getDirty-int-int-android.graphics.Bitmap.Config-">getDirty