OptionalpostFilter: (Filter entries by their ShortcutInfo, before adding/modifying the corresponding keys. Return false to filter the entry out, true to keep it.
The second argument also provides some additional info the function looks at to generate the result.
Given a chain, a shortcut list, and a manager, this will return a record with information for each key id regarding what shortcuts can be pressed and some additional information useful for visual displaying them on a keyboard (See KeyInfo).
The record will contain all renderable keys by their id (see Key.render). It will not contain variants or toggle states, only full keys (i.e. Keys.entries).
It is recommended you pre-filter the shortcut's list to remove any shortcuts that are disabled or not executable.
You can also post filter depending on the generated ShortcutInfo entry. See the postFilter param.