code: def get_camera_extended_properties(self):
          
          resource = 'cameras/{}'.format(self.device_id)
          resource_event = self.publish_and_get_event(resource)
  
          if resource_event is None:
              return None
  
          self._camera_extended_properties = resource_event.get('properties')
          return self._camera_extended_properties
docs: Return camera extended properties.