def METHOD_NAME(self, split=False):
    num_nodes = 3
    extra_args = [([
        "-exportdir={}/export{}".format(self.options.tmpdir, i), 
        '-allowdeprecated=getnewaddress',
        '-allowdeprecated=z_getnewaddress',
        ] + (["-walletrequirebackup"] if i == 0 else [])) for i in range(num_nodes)] 
    self.nodes = start_nodes(num_nodes, self.options.tmpdir, extra_args)