code: public void beforeTransformation(TypeDescription typeDescription, ClassLoader classLoader) {
  		if (isPreventDuplicateTransformation()) {
  			Dispatcher.put(getClassAlreadyTransformedKey(typeDescription, classLoader), Boolean.TRUE);
  		}
  
  		if (DEBUG_INSTRUMENTATION && logger.isDebugEnabled()) {
  			logger.debug("TRANSFORM {} ({})", typeDescription.getName(), getClass().getSimpleName());
  		}
  	}
docs: This method is called before the transformation.
  You can stop the transformation from happening by returning false from this method.
  
  @param typeDescription The type that is being transformed.
  @param classLoader     The class loader which is loading this type.