public String toString() {
        StringBuilder sb = new StringBuilder();
        sb.append(new String(getSignature(), UTF_8)).append(" ");
        sb.append(getVersion()).append(" ");
        sb.append(getHeaderLen()).append(" ");
        sb.append(getUnknown_000c()).append(" ");
        sb.append(getLastModified()).append(" ");
        sb.append(getLangId()).append(" ");
        sb.append(Arrays.toString(getDir_uuid())).append(" ");
        sb.append(Arrays.toString(getStream_uuid())).append(" ");
        sb.append(getUnknownOffset()).append(" ");
        sb.append(getUnknownLen()).append(" ");
        sb.append(getDirOffset()).append(" ");
        sb.append(getDirLen()).append(" ");
        sb.append(getDataOffset()).append(" ");
        return sb.toString();
    }
@Test
    public void testToString() {
        assertTrue(chmItsfHeader.toString().contains(TestParameters.VP_ISTF_SIGNATURE));
    }