def METHOD_NAME(tuple_arg, add_prefix=False):
    n = Name(self.new_name())
    arg = tuple_arg.clone()
    arg.prefix = ""
    stmt = Assign(arg, n.clone())
    if add_prefix:
        n.prefix = " "
    tuple_arg.replace(n)
    new_lines.append(pytree.Node(syms.simple_stmt,
                                 [stmt, end.clone()]))