code: def from_api_repr(cls, resource, zone):
          
          changes = cls(zone=zone)
          changes._set_properties(resource)
          return changes
docs: Factory:  construct a change set given its API representation
  
          :type resource: dict
          :param resource: change set representation returned from the API.
  
          :type zone: :class:`google.cloud.dns.zone.ManagedZone`
          :param zone: A zone which holds zero or more change sets.
  
          :rtype: :class:`google.cloud.dns.changes.Changes`
          :returns: RRS parsed from ``resource``.