addFileMessage method
Implementation
Future<void> addFileMessage(String localPath) async {
RCIMIWMediaMessage? message =
await engineProvider.engine?.createFileMessage(
_con.conversationType ?? RCIMIWConversationType.invalid,
_con.targetId ?? '',
_con.channelId,
localPath,
);
if (message != null) {
sendMessage(message);
}
}