Function rational_deduction::util::multiset_symmetric_difference_by

pub fn multiset_symmetric_difference_by<L, RItem, OL, F>(
    left: L, 
    right: Vec<RItem>, 
    eq: F
) -> (OL, impl Iterator<Item = RItem>) where
    L: IntoIterator,
    OL: FromIterator<L::Item>,
    F: FnMut(&L::Item, &RItem) -> bool, 

Computes the symmetric difference of two multisets.