Document.normalize_field_types method. Changes field type values [FieldChar.field_type](../../../aspose.words.fields/fieldchar/field_type/) of [FieldStart](../../../aspose.words.fields/fieldstart/), [FieldSeparator](../../../aspose.words.fields/fieldseparator/), [FieldEnd](../../../aspose.words.fields/fieldend/) in the whole document so that they correspond to the field types contained in the field codes.... doc = aw . Document () builder = aw . DocumentBuilder...field codes. self . assertEqual ( aw . fields . FieldType . FIELD_DATE...