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class IAReqMultiInstanceAlloc(IARequestBase):

  """An multi instance allocation request.

  """

  MODE = constants.IALLOCATOR_MODE_MULTI_ALLOC

  REQ_PARAMS = [

    ("instances", ht.TListOf(ht.TInstanceOf(IAReqInstanceAlloc)))

    ]

  _MASUCCESS = \

    ht.TListOf(ht.TAnd(ht.TIsLength(2),

                       ht.TItems([ht.TNonEmptyString,

                                  ht.TListOf(ht.TNonEmptyString),

                                  ])))

  _MAFAILED = ht.TListOf(ht.TNonEmptyString)

  REQ_RESULT = ht.TListOf(ht.TAnd(ht.TIsLength(2),

                                  ht.TItems([_MASUCCESS, _MAFAILED])))

  def GetRequest(self, cfg):

    return {

      "instances": [iareq.GetRequest(cfg) for iareq in self.instances]

      }