protected void addLibraryToRoots(final VirtualFile jarFile, OrderRootType rootType) {
addLibraryToRoots(myModule, jarFile, rootType);
}
protected static void addLibraryToRoots(final Module module, final VirtualFile jarFile, final OrderRootType rootType) {
final ModuleRootManager manager = ModuleRootManager.getInstance(module);
final ModifiableRootModel rootModel = manager.getModifiableModel();
final Library jarLibrary = rootModel.getModuleLibraryTable().createLibrary();
final Library.ModifiableModel libraryModel = jarLibrary.getModifiableModel();
libraryModel.addRoot(jarFile, rootType);
libraryModel.commit();
rootModel.commit();