SYNOPSIS
use Text::Xslate::Util qw(hash_with_default);
my $hash_ref = hash_with_default({ }, sub { "FILLME('@_')" });
print $hash_ref->{foo}; # FILLME('foo')
DESCRIPTION
This is a helper class to provide "hash_with_default()" functionality, which is useful for debugging.See Text::Xslate::Manual::Debugging for details.