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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_ssh_subsystem_names(self):
 """ Return a list of possible SSH subsystem names. Different NXOS versions use different SSH subsystem names for netconf. Therefore, we return a list so that several can be tried, if necessary. The Nexus device handler also accepts """

        preferred_ssh_subsystem = self.device_params.get("ssh_subsystem_name")
        name_list = [ "netconf", "xmlagent" ]
        if preferred_ssh_subsystem:
            return [ preferred_ssh_subsystem ] + \
                        [ n for n in name_list if n != preferred_ssh_subsystem ]
        else:
            return name_list