const { fields } = foundry.data; export class WeaponData extends foundry.abstract.TypeDataModel { static defineSchema() { return { traits: new fields.SetField( new fields.StringField({ blank: false, trim: true, nullable: false, }), { nullable: false, required: true, }, ), }; }; prepareBaseData() { super.prepareBaseData(); }; prepareDerivedData() { super.prepareDerivedData(); }; };