import com.google.common.collect.testing.features.CollectionSize;
import java.util.Collection;
import org.jspecify.annotations.NullMarked;
import org.jspecify.annotations.Nullable;

/**
 * The subject-generator interface accepted by Collection testers, for testing a Collection at one
 * particular {@link CollectionSize}.
 *
 * <p>This interface should not be implemented outside this package; {@link

```
# X.509 Certificate options
#
# DN options

# The organization of the subject.
organization = "Example Inc."

# The organizational unit of the subject.
#unit = "sleeping dept."

# The state of the certificate owner.
state = "Example"

# The country of the subject. Two letter code.
country = "EX"

# The common name of the certificate owner.
cn = "Sally Certowner"

-   [guava-discuss: For open-ended questions and discussion](https://groups.google.com/group/guava-discuss)

## IMPORTANT WARNINGS

1.  APIs marked with the `@Beta` annotation at the class or method level are
    subject to change. They can be modified in any way, or even removed, at any
    time. If your code is a library itself (i.e., it is used on the CLASSPATH of
    users outside your own control), you should not use beta APIs unless you

========

## Supported Versions

| Version | Supported           | Notes                                        |
| ------- | ------------------- | -------------------------------------------- |
| 5.x     | ✅                  | APIs subject to change in alpha releases.    |
| 4.x     | ✅                  | Android 5.0+ (API level 21+) and on Java 8+. |
| 3.x     | ❌ Ended 2021-12-31 | Android 2.3+ (API level 9+) and Java 7+.     |


## Reporting a Vulnerability

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runc

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The following is courtesy of our legal counsel:


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Create a real JWT access token and return it.

{* ../../docs_src/security/tutorial004_an_py310.py hl[118:133] *}

### Technical details about the JWT "subject" `sub` { #technical-details-about-the-jwt-subject-sub }

The JWT specification says that there's a key `sub`, with the subject of the token.

It's optional to use it, but that's where you would put the user's identification, so we are using it here.

     */
    String getMailSmtpServerMainHostAndPort();

    /**
     * Get the value for the key 'mail.subject.test.prefix'. <br>
     * The value is, e.g. [Test] <br>
     * comment: The prefix of subject to show test environment or not
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */