### Question:
DynamoDbEncryptor implements DynamoDbEncryptionClient { void setMaterialDescriptionFieldName(final String materialDescriptionFieldName) { this.materialDescriptionFieldName = materialDescriptionFieldName; } protected  DynamoDbEncryptor(EncryptionMaterialsProvider provider, String descriptionBase); protected  DynamoDbEncryptor(EncryptionMaterialsProvider provider); static Builder builder(); @Override Map<String, AttributeValue> encryptRecord(Map<String, AttributeValue> record,
                                                     DynamoDbEncryptionConfiguration configuration); @Override Map<String, AttributeValue> decryptRecord(Map<String, AttributeValue> record,
                                                     DynamoDbEncryptionConfiguration configuration);  }### Answer:
@Test public void testSetMaterialDescriptionFieldName() { assertNotNull(encryptor.getMaterialDescriptionFieldName()); encryptor.setMaterialDescriptionFieldName("A different value"); assertEquals("A different value", encryptor.getMaterialDescriptionFieldName()); }