libraryClassPool.clear();
// Copy the library classes that are referenced directly by program
// classes and the library classes that are referenced by referenced
// library classes.
reducedLibraryClassPool.classesAccept(
new MultiClassVisitor(new ClassVisitor[]
{
new ClassHierarchyTraveler(true, true, true, false,
new LibraryClassFilter(
new ClassPoolFiller(libraryClassPool))),