code: def addSiiToContainer(siiContainer, specfile, siiList):
      
      for sii in siiList:
          if sii.id not in siiContainer.container[specfile]:
              siiContainer.container[specfile][sii.id] = list()
          siiContainer.container[specfile][sii.id].append(sii)
docs: Adds the ``Sii`` elements contained in the siiList to the appropriate
      list in ``siiContainer.container[specfile]``.
  
      :param siiContainer: instance of :class:`maspy.core.SiiContainer`
      :param specfile: unambiguous identifier of a ms-run file. Is also used as
          a reference to other MasPy file containers.
      :param siiList: a list of ``Sii`` elements imported from any PSM search
          engine results