This is Perl module YAML::Visitor.

INSTALLATION

YAML::Visitor installation is straightforward. If your CPAN shell is set up,
you should just be able to do

    % cpan YAML::Visitor

Download it, unpack it, then build it as per the usual:

    % perl Makefile.PL
    % make && make test

Then install it:

    % make install

DOCUMENTATION

YAML::Visitor documentation is available as in POD. So you can do:

    % perldoc YAML::Visitor

to read the documentation online with your favorite pager.

Kazuhiro Nishikawa