initialize method
Implementation
@override
Future<int> initialize(String url) async {
final textureId = await methodChannel.invokeMethod<int>(
'initialize',
<String, dynamic>{'url': url},
);
if (textureId == null) {
throw PlatformException(
code: 'INITIALIZATION_FAILED',
message: 'Could not initialize player texture.',
);
}
return textureId;
}