="type parameter in Option">T</a>&nbsp;getDefaultValue()</pre>
<div class="block">Returns a reasonable default to use if no other value is set, or <code>null</code>.</div>
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<h4>update</h4>
<pre>public&nbsp;void&nbsp;update(<a href="http://d.android.com/reference/android/support/annotation/NonNull.html?is-exter