def copy_field_info(*, field_info: FieldInfo, annotation: Any) -> FieldInfo:
        cls = type(field_info)
        merged_field_info = cls.from_annotation(annotation)
        new_field_info = copy(field_info)
        new_field_info.metadata = merged_field_info.metadata
        new_field_info.annotation = merged_field_info.annotation
        return new_field_info