A JSON BasicMessageChannel for keyboard events.
Each incoming message received on this channel (registered using
BasicMessageChannel.setMessageHandler) consists of a Map with
platform-specific data, plus a
type field which is either
On Android, the available fields are those described by RawKeyEventDataAndroid's properties.
On Fuchsia, the available fields are those described by RawKeyEventDataFuchsia's properties.
No messages are sent on other platforms currently.
static const BasicMessageChannel<dynamic> keyEvent = BasicMessageChannel<dynamic>( 'flutter/keyevent', JSONMessageCodec(), )