[Question] Set a custom delimiter in NestedCompletions

I am using python-prompt-toolkit for Autocompletion and its working perfectly fine for single completion .but i need to use Nested completion. consider the following example from docs:

from prompt_toolkit import prompt
from prompt_toolkit.completion import NestedCompleter


completer = NestedCompleter.from_nested_dict(
    {
        "show": 
            {"version": None,
           
           "clock": None, 
            
            "ip": {"interface": {"brief": None}}
            },
        "exit": None,
    }
)


def main():
    text = prompt("Type a command: ", completer=completer)
    print("You said: %s" % text)


if __name__ == "__main__":
    main()

while it does work,it only works when i use space as a delimiter(i.e,keep space between words) to separate the words,like
show version.however i want to use '\\' or '/'(depending on os) as delimiter,so it would be like show/ip/interface/brief(similar to how shell path completion works).i know you can do that,but i can't figure out how?.Thanks in advance

Start with the documented NestedCompleter.from_nested_dict example and inspect how prompt-toolkit separates nested completion words. Determine whether a configurable delimiter can support the requested slash or backslash path form; the work is done when the demonstrated nested command completes with that delimiter on the relevant operating system.