frame_set = new SingleInheritanceFrameSet(pkg, sb, bbs, frame_set_name,
frame_set = new SingleInheritanceFrameSet(pkg, sb, bbs, domain, frame_set_name,
    private void startFrameset(Attributes attrs) {	if (log.isDebugEnabled())	    log.debug("startFrameset");		if (frame_set != null) return;	String pkg = attrs.getValue("package");	String container_relation = attrs.getValue("container-relation");	String inheritance = attrs.getValue("frame-inheritance");	String indexSlot = attrs.getValue("index-slot");	if (!inheritance.equals("single")) {	    throw new RuntimeException("Only single-inheritance FrameSets are supported!");	}	frame_set = new SingleInheritanceFrameSet(pkg, sb, bbs, frame_set_name,						  container_relation, indexSlot);    }