For testing, the Unicode Utilities now support the Unicode beta properties
(with some caveats). Example: \p{gcβ=Lu}-\p{gc=Lu}
<https://unicode.org/cldr/utility/list-unicodeset.jsp?a=%5Cp%7Bgc%CE%B2%3DLu%7D-%5Cp%7Bgc%3DLu%7D&g=&i=>
.Thanks to Sascha for helping to move to different infrastructure for the utilities... Mark
