Quarkus Extension - Conditional Configuration

[akil-rails]

I have one extension with 5 capabilities, each of which has it's own configuration (https://quarkus.io/guides/writing-extensions#configuration).

There are multiple projects that use this extension, and some need all 5 and some need just 1 or 2 of these capabilities.

Currently, each project has to specify the configuration of all 5 capabilities, irrespective of whether they use it or not.

How do I make the configuration optional? If a project wants to use a capability, it should provide the configuration, and if it doesn't then the configuration is not needed to be provided ( I can't use @WithDefault because there aren't any defaults )

Is there a pattern to implement opt-in of capabilities from a single extension?