URLPattern, "/", by the permission constructor. The empty string
 is an exact URLPattern, and may occur anywhere in a URLPatternSpec that an exact URLPattern may occur. The first
 URLPattern in a URLPatternSpec may be any of the pattern types, exact, path-prefix, extension, or default as defined
 in the <i>Jakarta Servlet Specification)</i>. When a URLPatternSpec includes a URLPatternList, the patterns of the
 URLPatternList identify the resources to which the permission does NOT apply and depend on the pat