Trouble writing custom interactions

From what I’ve tried, read, and watched, there doesn’t seem to be a reliable source of info on making custom interactions.

I’m trying to write a multi-tap and hold interaction for dashing in a fighting game, but having a lot of trouble.

The example given in the documentation seems to be missing some necessary code, and I can’t copy paste the files in the package imported from unity because the files are immutable.

Is there a tutorial out there that anyone knows and can share?