Prior to macOS 10.12, text markup annotations were configured through the PDFAnnotationMarkup class (see here). An annotation of this type could be configured to use the redact, underline, strikeOut, or highlight enumerations.
However, this has since been deprecated in favor of creating a PDFAnnotation with the PDFAnnotationSubtype structure. Subtypes exist for underline, highlight, and strikeOut, but no option for redact exists. What is the proper way to create a redaction annotation in the current API?