code: public String getTranslation() {
          if (codons == null) {
              return "";
          }
          StringBuilder translation = new StringBuilder();
          for (Codon codon : codons) {
              translation.append(codon.getAminoAcid());
          }
          return translation.toString();
      }
docs: Returns the translation including stop codons
  and trailing bases.
  @return the translation including stop codons
  and trailing base