code: def get_permissions(self):
          
          if not self.object_id:
              return []
  
          url = self.build_url(
              self._endpoints.get('permissions').format(id=self.object_id))
  
          response = self.con.get(url)
          if not response:
              return None
  
          data = response.json()
  
          # Everything received from cloud must be passed as self._cloud_data_key
          return [DriveItemPermission(parent=self, **{self._cloud_data_key: item})
                  for item in data.get('value', [])]
docs: Returns a list of DriveItemPermissions with the
          permissions granted for this DriveItem.
  
          :return: List of Permissions
          :rtype: list[DriveItemPermission]