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- /**
- * @name isValid
- * @category Common Helpers
- * @summary Is the given date valid?
- *
- * @description
- * Returns false if argument is Invalid Date and true otherwise.
- * Argument is converted to Date using `toDate`. See [toDate](https://date-fns.org/docs/toDate)
- * Invalid Date is a Date, whose time value is NaN.
- *
- * Time value of Date: http://es5.github.io/#x15.9.1.1
- *
- * @typeParam DateType - The `Date` type, the function operates on. Gets inferred from passed arguments. Allows to use extensions like [`UTCDate`](https://github.com/date-fns/utc).
- *
- * @param date - The date to check
- *
- * @returns The date is valid
- *
- * @example
- * // For the valid date:
- * const result = isValid(new Date(2014, 1, 31))
- * //=> true
- *
- * @example
- * // For the value, convertable into a date:
- * const result = isValid(1393804800000)
- * //=> true
- *
- * @example
- * // For the invalid date:
- * const result = isValid(new Date(''))
- * //=> false
- */
- export declare function isValid(date: unknown): boolean;
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