use icu::properties::CodePointSetData;
use icu::properties::props::QuotationMark;
let quotation_mark = CodePointSetData::new::<QuotationMark>();
assert!(quotation_mark.contains('\''));
assert!(quotation_mark.contains('„')); // U+201E DOUBLE LOW-9 QUOTATION MARK
assert!(!quotation_mark.contains('<'));