Groups items ensuring if the input groupSize is > 1 then the output groups should not contain a single item.
Groups items ensuring if the input groupSize is > 1 then the output groups should not contain a single item. Single items value merged into their previous gorup.
Groups items ensuring if the input groupSize is > 1 then the output groups should not contain a single item.
Groups items ensuring if the input groupSize is > 1 then the output groups should not contain a single item. Single items value merged into their previous gorup.