public void visitLookupSwitchInsn(final Label dflt, final int[] keys,
			final Label[] labels) {
		buf.setLength(0);
		buf.append(tab2).append("LOOKUPSWITCH\n");
		for (int i = 0; i < labels.length; ++i) {
			buf.append(tab3).append(keys[i]).append(": ");
			appendLabel(labels[i]);
			buf.append('\n');
		}
		buf.append(tab3).append("default: ");
		appendLabel(dflt);
		buf.append('\n');
		text.add(buf.toString());

		if (mv != null) {
			mv.visitLookupSwitchInsn(dflt, keys, labels);
		}
	}