Function sort_reverse 

pub fn sort_reverse<T, V, R: RangeBounds<T>, S: RangeBounds<T>, C: IncDecCpCmp<T, V>>(
    x: &R,
    y: &S,
    rebound: &V,
    t: &C,
) -> Ordering

Compares range a and b and returns the Reverse Consolidation Order std::cmp::Ordering value.

The sort order is meant to represent Reverse Consolidation Order not tradtional range sort order. Reverse Consolidation Order is represented as latest largest ranges first.

Put another way:

• GetBeginEnd.get_end() desc
• GetBeginEnd.get_begin() asc

Panics!

If the RangeBounds cannot be converted to a computable range!