code: public static String generateFasta(HELM2Notation helm2Notation2) throws FastaFormatException, ChemistryException {
  		List<PolymerNotation> polymersPeptides = new ArrayList<PolymerNotation>();
  		List<PolymerNotation> polymerNucleotides = new ArrayList<PolymerNotation>();
  		StringBuilder fasta = new StringBuilder();
  		for (PolymerNotation polymer : helm2Notation2.getListOfPolymers()) {
  			if (polymer.getPolymerID() instanceof RNAEntity) {
  				polymerNucleotides.add(polymer);
  			}
  			if (polymer.getPolymerID() instanceof PeptideEntity) {
  				polymersPeptides.add(polymer);
  			}
  		}
  
  		fasta.append(generateFastaFromPeptidePolymer(polymersPeptides));
  		fasta.append(generateFastaFromRNAPolymer(polymerNucleotides));
  
  		return fasta.toString();
  
  	}
docs: method to generate for the whole HELM2Notation fasta-files, it contains
  fasta for all rna and peptides
  
  @param helm2Notation2
  HELM2Notation
  @return FASTA-File-Format
  @throws FastaFormatException
  if the HELM2Notation can not be transformed to FASTA
  @throws ChemistryException
  if the Chemistry Engine can not be initialized