Sourcemaps in non-minified /assets/js/ files?

Hello,

Why are there sourcemaps in the non-minified versions of the javascript files for this plugin?

For example, forms-api.js has a sourcemap comment at the bottom. If I need to see the original script when a minified version is served, the sourcemap needs to be in the minified version or I could set define('SCRIPT_DEBUG', true); in my wp-config.php.

Is the sourcemap added to the non-minified version to allow a developer to copy it over to the minified version so testing can be done in a live environment without affecting other files being served by the site?

Thanks!

https://wordpress.org/plugins/mailchimp-for-wp/