docs: OmemoMessage.Sent createKeyTransportElement(OmemoManager.LoggedInOmemoManager managerGuard,
                                                  Set<OmemoDevice> contactsDevices,
                                                  byte[] key,
                                                  byte[] iv)
              throws InterruptedException, UndecidedOmemoIdentityException, CryptoFailedException,
              SmackException.NotConnectedException, SmackException.NoResponseException {
          return encrypt(managerGuard, contactsDevices, key, iv, null);
      }