// check for omitted fields
	zb0001Len := uint32(3)
	var zb0001Mask uint8 /* 3 bits */
	_ = zb0001Mask
	if z.MetaSys == nil {
		zb0001Len--
		zb0001Mask |= 0x4
	}
	// variable map header, size zb0001Len
	err = en.Append(0x80 | uint8(zb0001Len))
	if err != nil {
		return
	}
	if zb0001Len == 0 {
		return
	}
	// write "ID"

		header: []byte{0x28, 0xb5, 0x2f, 0xfd},
		f:      formatZstd,
	},
	{
		// Zstd skippable frame header.
		header: []byte{0x2a, 0x4d, 0x18},
		f:      formatZstd,
	},
	{
		// LZ4
		header: []byte{0x4, 0x22, 0x4d, 0x18},
		f:      formatLZ4,
	},
	{
		// Snappy/S2 stream
		header: []byte{0xff, 0x06, 0x00, 0x00},
		f:      formatS2,
	},
	{
		header: []byte{0x42, 0x5a, 'h'},
		f:      formatBZ2,
	},

				return
			}
			zb0001Mask |= 0x4
		default:
			err = dc.Skip()
			if err != nil {
				err = msgp.WrapError(err)
				return
			}
		}
	}
	// Clear omitted fields.
	if zb0001Mask != 0x7 {
		if (zb0001Mask & 0x1) == 0 {
			z.Index = nil
		}
		if (zb0001Mask & 0x2) == 0 {
			z.Checksums = nil
		}
		if (zb0001Mask & 0x4) == 0 {
			z.Error = ""
		}
	}
	return

        assertThrows(IllegalArgumentException.class, () -> cli.calculateDegreeOfConcurrency("-1"));
        assertThrows(IllegalArgumentException.class, () -> cli.calculateDegreeOfConcurrency("0x4"));
        assertThrows(IllegalArgumentException.class, () -> cli.calculateDegreeOfConcurrency("1.0"));
        assertThrows(IllegalArgumentException.class, () -> cli.calculateDegreeOfConcurrency("1."));