code: def _ParsePlistKeyValue(self, knowledge_base, name, value):
      
      if not knowledge_base.GetValue('keyboard_layout'):
        if name in self._PLIST_KEYS:
          if isinstance(value, (list, tuple)):
            value = value[0]
  
          _, _, keyboard_layout = value.rpartition('.')
  
          knowledge_base.SetValue('keyboard_layout', keyboard_layout)
docs: Parses a plist key value.
  
      Args:
        knowledge_base (KnowledgeBase): to fill with preprocessing information.
        name (str): name of the plist key.
        value (str): value of the plist key.