pub fn z_related_class(
cardinality: u8,
forte_class: u8,
) -> Result<Option<(u8, u8, i8)>, Error>Expand description
The set class Z-related to this one — the other with the same interval
vector — where there is one: music21’s addressToZAddress.
The inversion comes back read the way read_address reads one.
§Errors
When the address names no set class.