@Override
    public String toString() {
        return new StringJoiner(", ", SaslExtensions.class.getSimpleName() + "[", "]")
            .add("extensionsMap=" + extensionsMap)
            .toString();
    }
Implements <code>hashCode</code> using the native implementation from
{@link Object#hashCode()}.

<p/>

See the class-level documentation for details.

@return Hash code of instance
clients/src/main/java/org/apache/kafka/common/security/auth/SaslExtensions.java