if err != nil {
		t.Fatal(err)
	}
	req.RequestURI = "/?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=USWUXHGYZQYFYFFIT3RE%2F20170529%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20170529T190139Z&X-Amz-Expires=600&X-Amz-Signature=19b58080999df54b446fc97304eb8dda60d3df1812ae97f3e8783351bfd9781d&X-Amz-SignedHeaders=host&prefix=Hello%2AWorld%2A"

     * また、コピー元のプロパティ名からプレフィックスを除去した名前がコピー先のプロパティ名となります。
     * </p>
     *
     * @param prefix
     *            プレフィックス。{@literal null}や空文字列であってはいけません
     * @return このインスタンス自身
     */
    public CopyOptions prefix(final CharSequence prefix) {
        assertArgumentNotEmpty("propertyNames", prefix);

        this.prefix = prefix.toString();
        return this;
    }

    /**
     * JavaBeansのデリミタを設定します。

👉 🔜 ✊ ⏲ & 🔜 🕴 🔨 🕴.

⚫️ 🏆 🚫 📉 🎭. 👶

///

### 🔌 `APIRouter` ⏮️ 🛃 `prefix`, `tags`, `responses`, & `dependencies`

🔜, ➡️ 🌈 👆 🏢 🤝 👆 `app/internal/admin.py` 📁.

⚫️ 🔌 `APIRouter` ⏮️ 📡 *➡ 🛠️* 👈 👆 🏢 💰 🖖 📚 🏗.

👉 🖼 ⚫️ 🔜 💎 🙅. ✋️ ➡️ 💬 👈 ↩️ ⚫️ 💰 ⏮️ 🎏 🏗 🏢, 👥 🚫🔜 🔀 ⚫️ & 🚮 `prefix`, `dependencies`, `tags`, ♒️. 🔗 `APIRouter`:

```Python hl_lines="3" title="app/internal/admin.py"

mail.send.mock = true

# SMTP server settings for main: host:port
mail.smtp.server.main.host.and.port = localhost:25

# The prefix of subject to show test environment or not
mail.subject.test.prefix = [Test]

# The common return path of all mail
mail.return.path = root@localhost


# ========================================================================================

	return ldflagsStr
}

// genReleaseTag prints release tag to the console for easy git tagging.
func releaseTag(version string) (string, time.Time) {
	relPrefix := "DEVELOPMENT"
	if prefix := os.Getenv("MINIO_RELEASE"); prefix != "" {
		relPrefix = prefix
	}

	relSuffix := ""
	if hotfix := os.Getenv("MINIO_HOTFIX"); hotfix != "" {
		relSuffix = hotfix
	}

	relTag := strings.Replace(version, " ", "-", -1)

        val prefix = "${testCoveragePrefix}_"
        val shortenedSubprojectName = shortenSubprojectName(model.projectId, prefix + subProject)
        return model.projectId + "_" + if (subProject.isNotEmpty()) shortenedSubprojectName else "${prefix}0"
    }

    private
    fun shortenSubprojectName(prefix: String, subProjectName: String): String {

// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package cmd

import (
	"testing"
)

func TestExtractPrefixAndSuffix(t *testing.T) {
	specs := []struct {
		path, prefix, suffix string
		expected             string
	}{
		{"config/iam/groups/foo.json", "config/iam/groups/", ".json", "foo"},
		{"config/iam/groups/./foo.json", "config/iam/groups/", ".json", "foo"},

func (s StubKMS) ListKeys(ctx context.Context, req *ListRequest) ([]madmin.KMSKeyInfo, string, error) {
	matches := []madmin.KMSKeyInfo{}
	if req.Prefix == "" {
		req.Prefix = "*"
	}
	for _, keyName := range s.KeyNames {
		if wildcard.MatchAsPatternPrefix(req.Prefix, keyName) {
			matches = append(matches, madmin.KMSKeyInfo{Name: keyName, CreatedAt: StubCreatedAt, CreatedBy: StubCreatedBy})
		}
	}

	return matches, "", nil

        @Override
        public String getNamespaceURI(final String prefix) {
            return getNamespaceForPrefix(prefix, doc);
        }

        private String getNamespaceForPrefix(final String prefix, final Node namespaceContext) {
            Node parent = namespaceContext;
            String namespace = null;

            if ("xml".equals(prefix)) {
                namespace = "http://www.w3.org/XML/1998/namespace";

  @SuppressWarnings("unused") // most are called by reflection
  private static class Prepender {

    private final String prefix;
    private final int times;

    Prepender(@NotBlank @Nullable String prefix, int times) throws NullPointerException {
      this.prefix = prefix;
      this.times = times;
    }

    Prepender(String... varargs) {
      this(null, 0);
    }

    // just for testing