libuniversal-isa-perl - 1.20171012-1.1 main

UNIVERSAL is base class for ALL classes in Object Oriented Perl.
UNIVERSAL::isa (isa stands for "is a") is method which can tell
You if object is blessed in package or inherits from package.
.
This module overloads UNIVERSAL::isa with a version that makes sure
that, when called as a function on objects which override isa, isa will
call the appropriate method on those objects
.
In all other cases, the real UNIVERSAL::isa gets called directly.