public static <T> List<List<T>> groupPartitions(List<T> elements,
                                                int numGroups)

Given a list of elements and a target number of groups, generates list of groups of elements to match the target number of groups, spreading them evenly among the groups. This generates groups with contiguous elements, which results in intuitive ordering if your elements are also ordered (e.g. alphabetical lists of table names if you sort table names alphabetically to generate the raw partitions) or can result in efficient partitioning if elements are sorted according to some criteria that affects performance (e.g. topic partitions with the same leader).