def METHOD_NAME(self, timeout=5.0):
    """
    obj.searchMythBE(timeout=5.0) -> response dicts
        Filters responses for those from `mythbackend`.
      IN:
        timeout  -- in seconds
      OUT:
        response -- a generator returning dicts containing the fields
            content-length,   request,   date,   usn,    location,
            cache-control,    server,    ext,    st
    """
    location = []
    for res in self.search(timeout, (\
            'urn:schemas-mythtv-org:device:MasterMediaServer:1',
            'urn:schemas-mythtv-org:device:SlaveMediaServer:1')):
        if res['location'] not in location:
            location.append(res['location'])
            yield res