initialize method
void
initialize()
Implementation
void initialize() {
final channel = ClientChannel(grpcAddress,
port: port,
options: const ChannelOptions(credentials: const ChannelCredentials.insecure()));
gRpcStub = cloudSpeech.SpeechClient(channel, options: CallOptions(metadata: {"api-key" : _token!}));
gRpcConfig = cloudSpeech.RecognitionConfig();
gRpcConfigStream = cloudSpeech.StreamingRecognitionConfig.create();
gRpcRequestStream = cloudSpeech.StreamingRecognizeRequest.create();
}