send method
Send a binary message to the platform plugins on the given channel.
Returns a Future which completes to the received response, undecoded, in binary form.
Implementation
@override
Future<ByteData?>? send(String channel, ByteData? message) {
final MessageHandler? handler = _outboundHandlers[channel];
Future<ByteData?>? result =
handler == null ? delegate.send(channel, message) : handler(message);
if (result != null) {
_pendingMessages.add(result);
result.catchError((Object error) {
/* errors are the responsibility of the caller */
}).whenComplete(() => _pendingMessages.remove(result));
}
return result;
}