A sort order that orders all given regions lexicographically by reference and
numerically within a single reference sequence, and puts all non-provided regions at
the end. Regions are compared by start position first. If start positions
are equal, then we compare by end position.
A sort order that orders all given regions lexicographically by reference and numerically within a single reference sequence, and puts all non-provided regions at the end. Regions are compared by start position first. If start positions are equal, then we compare by end position.