Function historical_row_by_name 

pub fn historical_row_by_name(name: &str) -> Result<&'static HistoricalRow>

Looks a historical row up by music21’s name for it. The pre-v6 names with a Row prefix are accepted too.

use music21::historical_row_by_name;

let row = historical_row_by_name("WebernOp21")?.row();
assert!(row.is_twelve_tone_row());