// Test AppendTo serialization
	var serialized []byte
	serialized = finalChecksum.AppendTo(serialized, checksumCombined)

	// Use ChecksumFromBytes to deserialize the final checksum
	chksmOut := ChecksumFromBytes(serialized)
	if chksmOut == nil {
		t.Fatal("ChecksumFromBytes returned nil")
	}

	// Assert they are exactly equal
	if !chksmOut.Equal(finalChecksum) {

			b = append(b, parts...)
		}
	}
	return b
}

// ChecksumFromBytes reconstructs a Checksum struct from the serialized bytes created in AppendTo()
// Returns nil if the bytes are invalid or empty.
// AppendTo() can append a serialized Checksum to another already-serialized Checksum,
// however, in practice, we only use one at a time.
// ChecksumFromBytes only returns the first one and no part checksums.

			}

			// The source object has a checksum set, we need the destination to have one too.
			if srcChecksumDecrypted != nil {
				dstOpts.WantChecksum = hash.ChecksumFromBytes(srcChecksumDecrypted)

				// When an object is being copied from a source that is multipart, the destination will
				// no longer be multipart, and thus the checksum becomes full-object instead. Since