code: public DataSource<Long> generateSequence(long from, long to) {
  		return fromParallelCollection(new NumberSequenceIterator(from, to), BasicTypeInfo.LONG_TYPE_INFO);
  	}
docs: Creates a new data set that contains a sequence of numbers. The data set will be created in parallel,
  so there is no guarantee about the oder of the elements.
  
  @param from The number to start at (inclusive).
  @param to The number to stop at (inclusive).
  @return A DataSet, containing all number in the {@code [from, to]} interval.