[SuperPerms] Given a Permissions String, how to check if it's a compound permission?

Assume a Plugin has specified the following in it's plugin.yml.

Code:

permissions:
    doorman.*:
        description: Gives access to all doorman commands
        children:
            doorman.kick: true
            doorman.ban: true
            doorman.knock: true
            doorman.denied: false
    doorman.kick:
        description: Allows you to kick a user
        default: op
    doorman.ban:
        description: Allows you to ban a user
        default: op
    doorman.knock:
        description: Knocks on the door!
        default: true
    doorman.denied:
        description: Prevents this user from entering the door

If I'm given doorman.* as a string, how can I know what those children are?

Note that I'm not writing the doorman plugin

 

Where would you be given those strings? Are you writing the Doorman plugin, or some other plugin? Please explain your needs in better detail.

 

I'm not writing the doorman plugin, but a permissions plugin, and those compound permissions are a problem in the inheritance model.