code: public void changeEncoding(int newEncoding) {
          if (this.encoding != newEncoding) {
              int oldEncoding = this.encoding;
              // Transform the quality scores, if necessary
              this.transformQualityScoresArray(oldEncoding, newEncoding);
  
              // Transform the quality string
              this.obtainQualityStringFromQualityScoresArray(newEncoding);
              this.encoding = newEncoding;
          }
      }
docs: Change the encoding of the sequence, and recalculates the quality scores array
  
  @param newEncoding - New quality encoding