Translates requests which refer to any view path into operations on an underlying filesystem, where references to views have been rewritten as queries against actual files.
Intercept and handle moves and deletes involving view path(s); all others are passed untouched.
Intercept and rewrite queries involving views, and overlay views when enumerating files and directories.
Translate reads on view paths to the equivalent queries.
Intercept and fail any write to a view path; all others are passed untouched.