Detect display and APL support

function supportsDisplay(handlerInput) {
  // returns true if the skill is running on a device with a display (Echo Show, Echo Spot, etc.)
  //  Enable your skill for display as shown here: https://alexa.design/enabledisplay
    return  handlerInput.requestEnvelope.context &&
            handlerInput.requestEnvelope.context.System &&
            handlerInput.requestEnvelope.context.System.device &&
            handlerInput.requestEnvelope.context.System.device.supportedInterfaces  &&
            handlerInput.requestEnvelope.context.System.device.supportedInterfaces.Display &&
            handlerInput.requestEnvelope.context.System.device.supportedInterfaces.hasOwnProperty('Alexa.Presentation.APL');
}

function APLsupport(handlerInput) {
  const Interface = handlerInput.requestEnvelope.context.System.device.supportedInterfaces;
  return Interface['Alexa.Presentation.APL'];
}

if (!APLsupport(handlerInput)) {
      return handlerInput.responseBuilder
        .speak('APL no está soportado')
        .getResponse();
}