$callback->($self);

##</code><code>##

    $self->{CACHE}

##</code><code>##

    sub add_to_cache {
        my $self = shift;
        my $alias = shift;
        my @files = shift;
        push @{ $self->{CACHE}->{$alias} }, @files;
    }

##</code><code>##

    $cache->add_to_cache(ALIAS, @files_in_dir);