Yet Another CPAN Grep

DBIx-Class-HashAccessor ( G/GE/GETTY/DBIx-Class-HashAccessor-0.001.tar.gz, GETTY, 2017; MetaCPAN )

DBIx-Class-HashAccessor/lib/DBIx/Class/HashAccessor.pm ( view source; MetaCPAN )

    'data' => {
      'data_type' => 'VARCHAR',
      'size' => 255,
      'serializer_class' => 'JSON',
    }
  );

  __PACKAGE__->add_hash_accessor( da => 'data' );

In code

  # Access key in hash