old_contents: '''UniqueID facade.
  
  Returns the following depending on the platform:
  
  * **Android**: Android ID
  * **OS X**: Serial number of the device
  * **Linux**: Serial number using lshw
  * **Windows**: MachineGUID from regkey
  
  Simple Example
  --------------
  
  To get the unique ID::
  
      >>> from plyer import uniqueid
      >>> uniqueid.id
      '1b1a7a4958e2a845'
  
  .. versionadded:: 1.2.0
  
  .. versionchanged:: 1.2.4
      On Android returns Android ID instead of IMEI.
  '''
  
  
  class UniqueID(object):
      '''
      UniqueID facade.
      '''
  
      @property
      def id(self):
          '''
          Property that returns the unique id of the platform.
          '''
          return self.get_uid()
  
      def get_uid(self):
          return self._get_uid()
  
      # private
  
      def _get_uid(self, **kwargs):
          raise NotImplementedError()
  
new_contents: '''UniqueID facade.
  
  Returns the following depending on the platform:
  
  * **Android**: Android ID
  * **OS X**: Serial number of the device
  * **Linux**: Serial number using lshw
  * **Windows**: MachineGUID from regkey
  * **iOS**: UUID
  
  Simple Example
  --------------
  
  To get the unique ID::
  
      >>> from plyer import uniqueid
      >>> uniqueid.id
      '1b1a7a4958e2a845'
  
  .. versionadded:: 1.2.0
  
  .. versionchanged:: 1.2.4
      On Android returns Android ID instead of IMEI.
  '''
  
  
  class UniqueID(object):
      '''
      UniqueID facade.
      '''
  
      @property
      def id(self):
          '''
          Property that returns the unique id of the platform.
          '''
          return self.get_uid()
  
      def get_uid(self):
          return self._get_uid()
  
      # private
  
      def _get_uid(self, **kwargs):
          raise NotImplementedError()
  
subject: Add description for iOS in facade