Is this [the jQuery.find.tokenize method - added by @mgol] missing now? jQuery 3.7.0.

$.find.tokenize('.test');
Uncaught TypeError: $.find.tokenize is not a function
    at <anonymous>:1:8

We use this in pie6k/jquery.initialize. We watch the DOM for mutations that match a selector, and being able tokenise the selector allows us to ignore certain mutations that the selector would never match against.

Originally posted by @bezborodow in jquery/sizzle#242 (comment)