docs: public static List<KeyGroupRange> createKeyGroupPartitions(int numberKeyGroups, int parallelism) {
  		Preconditions.checkArgument(numberKeyGroups >= parallelism);
  		List<KeyGroupRange> result = new ArrayList<>(parallelism);
  
  		for (int i = 0; i < parallelism; ++i) {
  			result.add(KeyGroupRangeAssignment.computeKeyGroupRangeForOperatorIndex(numberKeyGroups, parallelism, i));
  		}
  		return result;
  	}