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import type { Validity, Rule } from "../types.ts";import type { ValidationUtils } from "../interfaces.ts";import { required } from "./required.ts";import { optionallyValid } from "../utils.ts";
export function requiredWhen(  callback: (    fieldValue: any,    validationUtils: ValidationUtils,  ) => boolean | Promise<boolean>,): Rule {  return async function requiredWhenRule(    value: any,    utils: ValidationUtils,  ): Promise<Validity> {    const result = callback(value, utils);    const isRequired = result instanceof Promise ? await result : result;    if (isRequired) {      return required(value);    }    return optionallyValid(true);  };}