code: public void addBeanToBeanMapping(BeanToBeanMapping beanToBeanMapping) {
  		beanToBeanMappings.put(ClassPair.get(beanToBeanMapping
  				.getSourceClass(), beanToBeanMapping.getDestinationClass()),
  				beanToBeanMapping);
  	}
docs: Add a mapping of properties between two beans
  
  @param beanToBeanMapping