BootstrapServiceRegistryBuilder bootstrapRegistryBuilder
= new BootstrapServiceRegistryBuilder();
// add a special ClassLoader
bootstrapRegistryBuilder.applyClassLoader( mySpecialClassLoader );
// manually add an Integrator
bootstrapRegistryBuilder.applyIntegrator( mySpecialIntegrator );
...
BootstrapServiceRegistry bootstrapRegistry = bootstrapRegistryBuilder.build();