### Question:
AccountAddress implements ByteSequence { public static AccountAddress fromAuthenticationKey(AuthenticationKey authenticationKey) { return new AccountAddress( authenticationKey.toByteArray().subseq(16, 16)); } private  AccountAddress(ByteArray bytes); static AccountAddress fromAuthenticationKey(AuthenticationKey authenticationKey); static AccountAddress fromByteArray(ByteArray bytes); static AccountAddress fromHexString(String hexString); @Override byte[] toArray(); @Override String toString();  }### Answer:
@Test public void testFromAuthenticationKey() { assertThat(AccountAddress.fromAuthenticationKey(AuthenticationKey.fromHexString(AUTH_KEY)).toString(), is(ACCOUNT_ADDRESS)); }