getting the value of line item entity field in CommerceLicenseRemoteBase class
Generally you'd do something like this:

$wrapper = entity_metadata_wrapper('commerce_license', $license);
$wrapper-&gt;PROPERTY_YOU_WANT-&gt;value();


(See here for more detail: https://www.drupal.org/documentation/entity-metadata-wrappers)

You could always ask in the issue queue for the module:

https://www.drupal.org/project/issues/commerce_license?categories=All