def __init__(self, order_dict, default_order=None):
self.order_dict = order_dict.copy()<EOL>self.default_order = default_order<EOL>
Create a reorderer.

        Args:
            order_dict (dict of (str, `PackageOrder`): Orderers to apply to
                each package family.
            default_order (`PackageOrder`): Orderer to apply to any packages
                not specified in `order_dict`.