public StringBuilder bytesToPrintFriendlyStringBuilder(byte[] phiBytes) {
        return bytesToPrintFriendlyStringBuilder(phiBytes, 0, phiBytes != null ? phiBytes.length : -1);
    }
@Test
    public void testBytesToPrintFriendlyStringBuilder() {
        assertEquals(hl7util.NULL_REPLACEMENT_VALUE, hl7util.bytesToPrintFriendlyStringBuilder((byte[]) null).toString());
        assertEquals(hl7util.EMPTY_REPLACEMENT_VALUE, hl7util.bytesToPrintFriendlyStringBuilder(new byte[0]).toString());
        assertEquals(EXPECTED_MESSAGE, hl7util.bytesToPrintFriendlyStringBuilder(TEST_MESSAGE_BYTES).toString());
    }