package Some::Package::Name;
use strict;
use warnings;

my $class_data;

sub some_class_method {
  my $class = shift;
  some_operation_to_define($class_data);
}

sub some_other_class_method {
  my $class = shift;
  return some_fuction_based_on($class_data);
}

##</code><code>##

my $class_data;

##</code><code>##

our $class_data;