code: public Object doConvertOne(JTransfo jTransfo, Object toObject, Class<?> domainObjectType, String... tags)
              throws JTransfoException {
          return jTransfo.convertTo(toObject, domainObjectType, tags);
      }
docs: Do the actual conversion of one object.
  
  @param jTransfo jTransfo instance in use
  @param toObject transfer object
  @param domainObjectType domain object type
  @param tags tags which indicate which fields can be converted based on {@link MapOnly} annotations.
  @return domain object
  @throws JTransfoException oops, cannot convert