code: private final static void retransformClass(Class<?> clazz) {
          if (detailedTransformTrace && tc.isEntryEnabled())
              Tr.entry(tc, "retransformClass", clazz);
  
          try {
              instrumentation.retransformClasses(clazz);
          } catch (Throwable t) {
              Tr.error(tc, "INSTRUMENTATION_TRANSFORM_FAILED_FOR_CLASS_2", clazz.getName(), t);
          }
  
          if (detailedTransformTrace && tc.isEntryEnabled())
              Tr.exit(tc, "retransformClass");
      }
docs: Ask the JVM to retransform the class that has recently been enabled for
  trace. This class will explicitly call the class loader to load and
  initialize the class to work around an IBM JDK issue with hot code replace
  during class initialization.
  
  @param clazz the class that needs to be instrumented with entry/exit trace