It's exactly like the 'my' keyword, except that scalar variables
declared with it track their own changes of value, printing the
diagnostics to STDERR.
INSTALLATION
To install this module, run the following commands:
perl Makefile.PL
make
make test
make install
DEPENDENCIES
Keyword::Declare
Data::Dx
Variable::Magic
COPYRIGHT AND LICENCE
Copyright (C) 2020, Damian Conway
This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.