Function unionRanges

unionRanges(
    a: RangeCoords | null,
    b: RangeCoords | null,
    reuse?: RangeCoords,
): RangeCoords | null
Finds the union of 2 ranges.
Parameters
- a: RangeCoords | null
- b: RangeCoords | null
- Optionalreuse: RangeCoords
Returns RangeCoords | null

Remarks
This is null safe.