entry_maker option doesn't seem to work.

[Rizhiy]

Hi, I use folke/persistence.nvim for saving my sessions, so their filenames are a bit ugly (e.g. %home%rizhiy%.local%state%nvim%sessions.vim).
I thought that I can modify how they are displayed using entry_maker options, but it doesn't seem to be working.
Here is my attempt:

extensions = {
    xray23 = {
        sessionDir = vim.fn.expand(vim.fn.stdpath("state") .. "/sessions/"),
        entry_maker = function(entry)
            return {
                value = entry,
                display = entry:match("[^%%]*$"):sub(1, -5),
                ordinal = entry[1],
            }
        end,
    },
},

What am I doing wrong?

I tried using vim.print() to debug, but it seems the function is not even being called.