private void internalTracking(boolean b) {
		if (b) {
			class TrackingSlip {
				private String id;

				TrackingSlip(String s) {
					id = s;
				}

				String getSlip() {
					return id;
				}
			}
			TrackingSlip ts = new TrackingSlip("slip");
			String s = ts.getSlip();
		}
		// Can't use it here! Out of scope:
		// ! TrackingSlip ts = new TrackingSlip("x");
	}