byte[] d = builder.buildClass( classDef);
data.write( convertClassToResourcePath(classDef.getClassName()), d );
classLoader = new PackageClassLoader(data, ClassLoaderUtil.getClassLoader( null, getClass(), false ));
this.store = new ClassFieldAccessorStore();
store.setClassFieldAccessorCache( new ClassFieldAccessorCache( classLoader ) );
store.setEagerWire( true );
Class clazz = classLoader.loadClass( classDef.getClassName() );
classDef.setDefinedClass( clazz );