RetrieveFeatureProperty

{
  "topic": "com.acme/xdk_53/things/twin/commands/retrieve",
  "headers": {},
  "path": "/features/accelerometer/properties/x"
}

RetrieveFeaturePropertyResponse

{
  "topic": "com.acme/xdk_53/things/twin/commands/retrieve",
  "headers": {},
  "path": "/features/accelerometer/properties/x",
  "value": 42,
  "status": 200
}