Regex Diagrams Inside EBNF Diagrams

Question

I would like to see the ability to includ regex diagrams inside ebnf specials...

Here is an example:

https://www.plantuml.com/plantuml/uml/SoWkIImgIKtAI-CgoIp9ILLmhKZCBG3IGQdfgHKABfc9wKM9kGgUUSMPAK199pytc1WNLt51Qd9cOew2hOAzGX58kPL2OasIWhqrbqDgNWh8J000

I would suggest adding starting and stopping terminals in the regex, and would suggest it only allow one regex per special (more then one in a special I would suggest a side diagram as it would need details on what to pick)..

So this diagram should show a regex alteration inside a ebnf special dotted box...

This is common in EBNF, ebnf for big things, but low level formats are often represented as simple regexes.