title: Is it possible to listen for changes to a shadow with aws-greengrass-core-sdk?
body: <p>Currently we are using the greengrass core shadow to pass a config file to our app, if any changes are made to the shadow we want to update the config. Currently we are using the aws-iot-device-sdk and subscribing to the shadow, in an ideal situation we would like to use the aws-greengrass-core-sdk to listen and retreive the shadow.</p>
  
  <p>Any help is extremely appreciated :)</p>