make chained accessors
A chained accessor is one that always returns the object when called
with parameters (to set), and the value of the field when called with no
arguments.

This module subclasses Class::Accessor in order to provide the same
mk_accessors interface.

Maintainer: The OpenBSD ports mailing-list <ports@openbsd.org>

WWW: https://metacpan.org/release/Class-Accessor-Chained
