mationProperty</a></span><span class="signature">(<span class="parameter" id="-param-initialValue">{<span>required</span> <span class="type-annotation">T</span> <span class="parameter-name">initialValue</span>, </span><span class="parameter" id="-param-name"><span class="type-annotation"><a href="https://api.flutter.dev/flutter/dart-core/String-class.html">String</a>?</span> <span class="parameter-name">name</span>, </span><span class="parameter" id="-param-container"><span class="type-annotation"><a href="