Ho to make it work with Tiny 5?

[hiol83]

I've tryed but i find this error in the console:

Uncaught Error: Errors:
Failed path: (toolbarbutton)
Could not find valid strict value for "onAction" in {
"title": "My button",
"text": "Insert variable",
"type": "button"
}

Input object: {
"title": "My button",
"text": "Insert variable",
"type": "button"
}
at theme.min.js:4
at Object.getOrDie (theme.min.js:4)
at theme.min.js:4
at theme.min.js:4
at Object.fold (theme.min.js:4)
at theme.min.js:4
at Object.fold (theme.min.js:4)
at pD (theme.min.js:4)
at theme.min.js:4
at V (theme.min.js:4)

Someone was able to make it work with Tiny new version?