* Support `Optional<?>` * These are properties without a default value. The user needs to provide a value explicitly. * Update doc generator to take blank properties into account * See https://github.com/pmd/pmd/wiki/Property-framework-7-0-0#blank-properties * :information_source: Note: There is a branch by @oowekyala that might contain some of the tasks above: https://github.com/pmd/pmd/compare/pmd/7.0.x...oowekyala:pmd:1432-property-framework-upgrade-pmd7
Optional<?>