String s = session.toString();
        assertTrue(s.contains("targetHost=server.example"));
        assertTrue(s.contains("targetDomain=EXAMPLE"));
    }

    @Test
    @DisplayName("getExpiration: null when unset, value when positive")
    void testGetExpiration() {
        SmbSessionImpl session = newSession();
        assertNull(session.getExpiration());
        setField(session, "expiration", 123L);

	defer t.mu.RUnlock()

	return t.syncEvents
}

func (t *apiConfig) getObjectMaxVersions() int64 {
	t.mu.RLock()
	defer t.mu.RUnlock()

	if t.objectMaxVersions <= 0 {
		// defaults to 'IntMax' when unset.
		return math.MaxInt64
	}

	return t.objectMaxVersions

        // Test clearing a flag that is not set
        message.setFlags(0b1000);
        message.setFlag(0b0001, false);
        assertEquals(0b1000, message.getFlags(), "Clearing an unset flag should not change other flags.");
    }

    @Test
    void testReadULong() {
        // Test readULong with various values
        byte[] data = new byte[8];

      echo "JAVA_HOME is set to \"$JAVA_HOME\", but \"\$JAVA_HOME/bin/java\" does not exist." >&2
      exit 1
    fi
  fi
else
  JAVACMD="`\\unset -f command; \\command -v java`"

  if [ ! -x "$JAVACMD" ] ; then
    echo "The java(1) command does not exist in PATH nor is JAVA_HOME set, so Apache Maven cannot be started." >&2
    exit 1
  fi
fi

    }
}

// in plugin
existingThing = objects.newInstance(DefaultExistingThing.class)
existingThing.convention("some-value")
```

It's not acceptable to treat an unset Provider as if the convention is requested when the convention could be set elsewhere:

```groovy
public interface NewThing {
    Property<String> getSomeProperty()
}

// Unacceptable
String value

     * for the current build session and do not modify the underlying project model.
     *
     * @param project the project to modify
     * @param key they property's key
     * @param value the value or {@code null} to unset the property
     */
    void setProperty(@Nonnull Project project, @Nonnull String key, @Nullable String value);

    /**
     * Returns the original project being built when the input project is a forked project.

   * high 32 bits of each long is the "prev" pointer, whereas the low 32 bits is the "succ" pointer
   * (pointing to the next entry in the linked list). The pointers in [size(), entries.length) are
   * all "null" (UNSET).
   *
   * <p>A node with "prev" pointer equal to {@code ENDPOINT} is the first node in the linked list,
   * and a node with "next" pointer equal to {@code ENDPOINT} is the last node.
   */

      # IBM's JDK on AIX uses strange locations for the executables
      JAVACMD="$JAVA_HOME/jre/sh/java"
    else
      JAVACMD="$JAVA_HOME/bin/java"
    fi
  else
    JAVACMD="$(
      \unset -f command 2>/dev/null
      \command -v java
    )"
  fi
fi

if [ ! -x "$JAVACMD" ]; then
  echo "Error: JAVA_HOME is not defined correctly." >&2
  echo "  We cannot execute $JAVACMD" >&2
  exit 1

  /** Singleton placeholder that indicates a value is being loaded. */
  @SuppressWarnings("unchecked") // impl never uses a parameter or returns any non-null value
  static <K, V> ValueReference<K, V> unset() {
    return (ValueReference<K, V>) UNSET;
  }

  private enum NullEntry implements ReferenceEntry<Object, Object> {
    INSTANCE;

    @Override
    public @Nullable ValueReference<Object, Object> getValueReference() {

	// MINIO_KMS_SECRET_KEY_FILE - either to the argument passed to
	// the container or to a default string (e.g. "minio_master_key").
	//
	// We have to distinguish a explicit config from an implicit. Hence,
	// we unset the env. vars if they are set but empty or contain a path
	// which does not exist. The downside of this check is that if
	// MINIO_KMS_SECRET_KEY_FILE is set to a path that does not exist,