question: public static SequencesReader createSequencesReader ( final SequenceDataSource source ) throws IOException { final List < byte [ ] > data = new ArrayList < > ( ) ; final List < String > labels = new ArrayList < > ( ) ; final List < Long > counts = new ArrayList < > ( ) ; int min = Integer . MAX_VALUE ; int max = Integer . MIN_VALUE ; while ( source . nextSequence ( ) ) { final byte [ ] b = new byte [ source . currentLength ( ) ] ; System . arraycopy ( source . sequenceData ( ) , 0 , b , 0 , source . currentLength ( ) ) ; data . add ( b ) ; labels . add ( source . name ( ) ) ; counts . add ( ( long ) source . currentLength ( ) ) ; min = Math . min ( min , source . currentLength ( ) ) ; max = Math . max ( max , source . currentLength ( ) ) ; } final byte [ ] [ ] dataArray = data . toArray ( new byte [ data . size ( ) ] [ ] ) ; final String [ ] labelsArray = labels . toArray ( new String [ labels . size ( ) ] ) ; return new CompressedMemorySequencesReader ( dataArray , labelsArray , ArrayUtils . asLongArray ( counts ) , min , max , source . type ( ) ) ; }
target:  Creates a sequences reader from the specified source. Not optimised, intended only for testing