### Question:
CheckInMemoryDataSourceTypeValidator implements ConstraintValidator<CheckInMemoryDataSourceType, ClientReferenceable>,
        ValidationErrorDescriptorBuilder { @Override public void initialize(CheckInMemoryDataSourceType constraintAnnotation) { }  @Override void initialize(CheckInMemoryDataSourceType constraintAnnotation); @Override boolean isValid(ClientReferenceable value, ConstraintValidatorContext context); @Override ErrorDescriptor build(ConstraintViolation violation);  }### Answer:
@Test public void initialize_success() { CheckInMemoryDataSourceType checkInMemoryDataSourceType = mock(CheckInMemoryDataSourceType.class); checkInMemoryDataSourceTypeValidator.initialize(checkInMemoryDataSourceType); }