code: public static ISonarConverter getConverterInstance() {
  
          if (converterInstance == null) {
  
              synchronized (DefaultSonarConverter.class) {
  
                  if (converterInstance == null)
                      converterInstance = new DefaultSonarConverter();
              }
          }
  
          return converterInstance;
      }
docs: Retrieve an instance of an {@link ISonarConverter} object.
  
  @return A singleton instance of {@link ISonarConverter}.