add static method dm.dfs_setup

        for k, v in DFS_CONF[dfs_node].items():

            os.environ[k] = v

    @staticmethod

    def dfs_setup(dfs_node="pml"):

        """ Setup DFS configuration. """

        assert dfs_node in DFS_CONF.keys()

        for k, v in DFS_CONF[dfs_node].items():

            os.environ[k] = v

    @staticmethod

    def dfs_is_available():

        """ Test if DFS works. """