Map func to every ABITypedData element in the tree. func will
    receive two args: abi_type, and data

def data_tree_map(func, data_tree):
    """
    Map func to every ABITypedData element in the tree. func will
    receive two args: abi_type, and data
    """
    def map_to_typed_data(elements):
        if isinstance(elements, ABITypedData) and elements.abi_type is not None:
            return ABITypedData(func(*elements))
        else:
            return elements
    return recursive_map(map_to_typed_data, data_tree)