Function part_movements_within_limits 

pub fn part_movements_within_limits(
    a: &[Pitch],
    b: &[Pitch],
    limits: &[(usize, IntegerType)],
) -> Result<bool>

Whether each part named in limits moves no further than the semitones beside it from a to b. Parts are numbered from one, the highest.

Errors

A part number either possibility has no part for.