Security groups can restrict some features so that they are accessible only to users that belong to these groups. Security groups can also inherit other groups, so they also grant their permissions.
These two features combined are used to implement a usability feature in Odoo: feature toggling. Security groups can also be used as a way to enable or disable features for some or all the users in an Odoo instance.
This recipe shows how to add options to configuration settings and showcases the two methods to enable additional features, making them visible using security groups or adding them by installing an additional module.
For the first case, we will make the book-release dates an optional additional feature and for the second, as an example, we will provide an option to install the Notes module.
