/**
 * Utility class for handling Maven model version operations during upgrades.
 *
 * <p>This class uses domtrip internally for superior formatting preservation
 * and simplified API while maintaining the same external interface.
 */
public final class ModelVersionUtils {

    private ModelVersionUtils() {
        // Utility class
    }

    /**
     * Detects the model version from a POM document.

             Searching for package file structure from directories
             with <font color="#3465A4">__init__.py</font> files
             Importing from <font color="#75507B">/home/user/code/</font><font color="#AD7FA8">awesomeapp</font>

   <span style="background-color:#007166"><font color="#D3D7CF"> module </font></span>  🐍 main.py

	if err := DB.Model(&users).Association("Manager").Append(
		GetUser("manager-slice-belongs-to-test-1", Config{}),
	).Error; err == nil {
		t.Errorf("unmatched length when update user's manager")
	}

	// Replace -> same as append

	// Delete
	if err := DB.Model(&users).Association("Company").Delete(&users[0].Company); err != nil {
		t.Errorf("no error should happened when deleting company, but got %v", err)
	}

                "        </iframe> \n" +
                "    </div> \n" +
                "  </div> \n" +
                "</details>");

        // Same for the Wistia-hosted videos
        rewritten = rewritten.replaceAll("\\@wistia\\(([a-zA-Z\\-_]+)\\,([^\\s<]+)\\)\\@",
            "<details> \n" +
                "  <summary>📺 Watch the $1</summary> \n" +

	return x.Flags&xlFlagInlineData != 0
}

// signatureErr is a signature returned when an error occurs.
var signatureErr = [4]byte{'e', 'r', 'r', 0}

// getSignature will return a signature that is expected to be the same across all disks.
func (j xlMetaV2Version) getSignature() [4]byte {
	switch j.Type {
	case ObjectType:
		return j.ObjectV2.Signature()
	case DeleteType:
		return j.DeleteMarker.Signature()
	case LegacyType:

        when(request.cwd()).thenReturn(workingDirectory);
        when(request.installationDirectory()).thenReturn(Paths.get("/maven"));
        when(request.userHomeDirectory()).thenReturn(Paths.get("/home/user"));
        when(request.topDirectory()).thenReturn(workingDirectory);
        when(request.rootDirectory()).thenReturn(Optional.empty());
        when(request.userProperties()).thenReturn(Map.of());

	}
	copy(sealedKey.Key[:], encryptedKey.Bytes())
	return sealedKey
}

// Unseal decrypts a sealed key using the 256 bit external key. Since the sealed key
// may be cryptographically bound to the object's path the same bucket/object as during sealing
// must be provided. On success the ObjectKey contains the decrypted sealed key.
func (key *ObjectKey) Unseal(extKey []byte, sealedKey SealedKey, domain, bucket, object string) error {

执行测试：

<div class="termy">

```console
$ pytest

================ test session starts ================
platform linux -- Python 3.6.9, pytest-5.3.5, py-1.8.1, pluggy-0.13.1
rootdir: /home/user/code/superawesome-cli/app
plugins: forked-1.1.3, xdist-1.31.0, cov-2.8.1
collected 6 items

---> 100%

test_main.py <span style="color: green; white-space: pre;">......                            [100%]</span>

            if (relocatedArtifact != null) {
                if (withinSameGav(relocatedArtifact, a)) {
                    result.setArtifact(relocatedArtifact);
                    return model; // they share same model
                } else {
                    result.addRelocation(a);
                    a = relocatedArtifact;
                    result.setArtifact(a);
                }
            } else {

	// Decode signature string to binary byte-sequence representation is required
	// as Base64 encoding of a value is not unique:
	// For example "aGVsbG8=" and "aGVsbG8=\r" will result in the same byte slice.
	signature1, err := base64.StdEncoding.DecodeString(sig1)
	if err != nil {
		return false
	}
	signature2, err := base64.StdEncoding.DecodeString(sig2)
	if err != nil {
		return false
	}