both be set to match_parent (assuming the parent ExpandableFabLayout has no size restrictions).</li>
<li>Overlays must be defined within an <a href="../-expandable-fab-layout/index.html">ExpandableFabLayout</a> to function properly.</li>
<li>To ensure that Overlays cover screen content but NOT the ExpandableFab widget itself,
ensure the Overlay is the first child of ExpandableFabLayout via XML, or the first view passed
to ExpandableFabLayout's addView/addViews methods via code.</li>
</ol>
<p>Implementation 