1. Extract method

2. Ecc from QrCode
3. I did not changed QrCode.Ecc to Ecc in signature of
makeSegmentsOptimally()

java/src/main/java/io/nayuki/qrcodegen/QrSegmentAdvanced.java

@@ -68,7 +68,7 @@ public final class QrSegmentAdvanced {
 	 * @throws IllegalArgumentException if 1 ≤ minVersion ≤ maxVersion ≤ 40 is violated
 	 * @throws DataTooLongException if the text fails to fit in the maxVersion QR Code at the ECL
 	 */
-	public static List<QrSegment> makeSegmentsOptimally(String text, QrCode.Ecc ecl, int minVersion, int maxVersion) {
+	public static List<QrSegment> makeSegmentsOptimally(String text, Ecc ecl, int minVersion, int maxVersion) {
 		// Check arguments
 		Objects.requireNonNull(text);
 		Objects.requireNonNull(ecl);