Regex variables/found groups

I would like to have usable groups found in regex to use in the condition.

For example modules:

• composeApp
• libUi
• libImpl
• testUi
• testImpl
• another

Would like to specify that Ui modules could depends only its impl module.
It means libUi could depends ONLY libImpl and no more impl modules.
The same for testUi could depends only testImpl. There is prohibited to depends libImpl from testUi.

So i would like to specify regex like: (.*)Ui
Which means there are two groups:
0. all the string

1. (.*) before Ui string, that means for libUi it is lib string

And then in allowed array would like to write something like:

moduleGraphAssert {
    configurations += setOf("commonMainImplementation", "commonMainApi")
    maxHeight = 3
    allowed = arrayOf(
        "(.*)Ui$ -> $1lib$",
    )
    restricted = arrayOf(
    )
    assertOnAnyBuild = true
}

Start at the moduleGraphAssert configuration and the parsing of allowed and restricted rules. Compare the (.*)Ui$ -> $1lib$ example against the listed module names; done means captured regex groups can be referenced in allowed rules and the stated Ui/impl restrictions are expressible.