/**
 * The {@code encryptedFields} document that allows inferring which data keys are <strong>known to be created</strong>
 * before {@code this} exception happened. Creation of a data key includes persisting it in the key vault.</p>
 * <p>
 * Note that the returned {@code encryptedFields} document is not guaranteed to contain information about all the data keys that
 * were created, only about those that the driver is certain about. For example, if persisting a data key times out,
 * the driver does not know whether it can be considered created or not, and does not include the information about the key in
 * the {@code encryptedFields} document. You can analyze whether the {@linkplain #getCause() cause} is a definite or indefinite
 * error, and rely on the returned {@code encryptedFields} to be containing information on all created keys
 * only if the error is definite.</p>
 *
 * @return The updated {@code encryptedFields} document.
 */
public BsonDocument getEncryptedFields()