New extension to protect groups

I have just published an extension we (CiviCooP) developed for PUM Senior Experts. They wanted to make sure that contacts could only be added/removed to/from some groups by specific users. So we have created an extension for them, adding a permission and setting the group behaviour. For more details and download, check https://civicrm.org/extensions/group-protect

Thanks to PUM Senior Experts for the funding! The extension has been developed for Drupal (permissions) and will be tested by PUM Senior Experts in the coming months. Thought I'd share already anyway :-)