// (Therefore it is invalid for a "..." wildcard to appear anywhere but at the end of a pattern.)
// The match for a wildcard can be obtained by calling [Request.PathValue] with the wildcard's name.
// A trailing slash in a path acts as an anonymous "..." wildcard.
//
// The special wildcard {$} matches only the end of the URL.
// For example, the pattern "/{$}" matches only the path "/",