ef="dart-core/String-class.html">String</a></span> <span class="parameter-name">name</span>, </span> <span class="parameter" id="PlatformMessageCallback-param-data"><span class="type-annotation"><a href="dart-typed_data/ByteData-class.html">ByteData</a></span> <span class="parameter-name">data</span>, </span> <span class="parameter" id="PlatformMessageCallback-param-callback"><span class="type-annotation"><a href="dart-ui/PlatformMessageResponseCallback.html">PlatformMessageResponseCallback</a></span> <span