@Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        KeyId keyId = (KeyId) o;
        return Arrays.equals(keyIdBytes, keyId.keyIdBytes);
    }
@return the raw backing byte array. <strong>Must therefore not be mutated.</strong>
security-utils/src/main/java/com/yahoo/security/KeyId.java