paramLabel">Parameters:</span></dt>
<dd><code>placeholder</code> - The placeholder drawable to optionally show, or null.</dd>
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<h4>onResourceLoading</h4>
<pre>protected&nbsp;void&nbsp;onResourceLoading(@Nullable
                                 android.graphics.drawable.Drawable&nbsp;placeholder)</pre>
<div class="block">An optional callback invoked when a resource 