code: public ByteBuffer getSecretVersion(final String secretId, final String clientRequestToken) {
          final GetSecretValueRequest getSecretValueRequest = new GetSecretValueRequest();
          getSecretValueRequest.setSecretId(secretId);
          getSecretValueRequest.setVersionId(clientRequestToken);
          final GetSecretValueResult result = getDelegate().getSecretValue(getSecretValueRequest);
          return result.getSecretBinary();
      }
docs: Retrieve a specific version of the secret. This requires the permission <code>secretsmanager:GetSecretValue</code>
  
  @param secretId the ARN of the secret
  @param clientRequestToken the version identifier of the secret
  @return the Fernet key or keys in binary form