returns a collection of equal-formatted cell range collections.
Each cell of the original range is contained in one of the
ranges (even unformatted cells). If there is a non-rectangular
equal-formatted cell area, it will be split into several
rectangular ranges.
All equal-formatted ranges are consolidated into one collection.
These collections are the members contained in a
UniqueCellFormatRanges collection.
Returns
the collection of equal-formatted cell range collections.
