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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _get_peer_type_param(self, peer_type):
 """ Checks if the resource_root's API version is >= 11 and construct type param. """

    params = None
    if self._get_resource_root().version >= 11:
      params = {
        'type':   peer_type,
      }
    return params