Interface VariantArg<T>

interface VariantArg<T extends types.IDL.Type> {
    type: "variant";
    options: string[];
    defaultValue: string;
    fields: AllArgTypes<T>[];
    defaultValues: ArgTypeFromIDLType<T>;
    maxLength?: number;
    minLength?: number;
    label: string;
    validate: (value: any) => string | boolean;
}