directive @predictions(actions: [PredictionsActions!]!) on FIELD_DEFINITION
enum PredictionsActions {
  identifyText # uses Amazon Rekognition to detect text
  identifyLabels # uses Amazon Rekognition to detect labels
  convertTextToSpeech # uses Amazon Polly in a lambda to output a presigned url to synthesized speech
  translateText # uses Amazon Translate to translate text from source to target language
}