The builder feature provides an inheritable and role-composable way to
provide a default attribute value.
-=item L<Moose::Cookbook::Basics::Recipe9> - Operator overloading, subtypes, and coercion
+=item L<Moose::Cookbook::Basics::Genome_OverloadingSubtypesAndCoercion>
Demonstrates using operator overloading, coercion, and subtypes to
model how eye color is determined during reproduction.