or download this
package TDP::RewriteSettlementFiles::Util::ModifyNumbers;
use base 'TDP::RewriteSettlementFiles::Base';
...
mk_accessor_mutator(__PACKAGE__, '_platform', [ qw/tst dev it uat/ ]);
mk_accessor_mutator(__PACKAGE__, '_system', [ qw/airbp airworld avfu
+el aviation chevron shell/ ]);
mk_accessor_mutator(__PACKAGE__, 'merchant');