tle="Used to store default values for fields and function arguments.">@:value({ type : null })</span><span class="label label-static">static</span><a href="#exists"><span class="identifier">exists</span></a>(<span style="white-space:nowrap">id:<a class="type" title="String - The basic String class." href="../../String.html">String</a>,</span> <span style="white-space:nowrap">?type:<a class="type" title="openfl.utils.AssetType - The AssetType enum lists the core set of available asset types from the OpenFL c