code: public ClassReloadingStrategy enableBootstrapInjection(File folder) {
          return new ClassReloadingStrategy(instrumentation, strategy, new BootstrapInjection.Enabled(folder), preregisteredTypes);
      }
docs: Enables bootstrap injection for this class reloading strategy.
  
  @param folder The folder to save jar files in that are appended to the bootstrap class path.
  @return A class reloading strategy with bootstrap injection enabled.