Function braille_unicode_to_symbols 

pub fn braille_unicode_to_symbols(
    braille: &str,
    filled: &str,
    empty: &str,
) -> Result<String>

Braille drawn as dots, each cell two columns of three rows, filled and empty: music21’s brailleUnicodeToSymbols.

Errors

A character that is not a braille cell.