A common platform interface for the
This interface allows platform-specific implementations of the
plugin, as well as the plugin itself, to ensure they are supporting the
To implement a new platform-specific implementation of
FlutterJsPlatform with an implementation that performs the
platform-specific behavior, and when you register your plugin, set the default
FlutterJsPlatform by calling
FlutterJsPlatform.instance = MyFlutterJsPlatform().