Non-nullable property 'Builder' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Non-nullable property 'File' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Non-nullable property 'Tag' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Non-nullable property 'Annotation' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Non-nullable property 'AddHost' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Non-nullable property 'Allow' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Non-nullable property 'BuildArg' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Non-nullable property 'BuildContext' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Non-nullable property 'Builder' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.