code: def quota(self, quota):
          
          if quota is None:
              raise ValueError("Invalid value for `quota`, must not be `None`")
          if quota is not None and quota < 0:
              raise ValueError("Invalid value for `quota`, must be a value greater than or equal to `0`")
  
          self._quota = quota
docs: Sets the quota of this ServicePackageQuota.
          Available quota for the service package.
  
          :param quota: The quota of this ServicePackageQuota.
          :type: int