/**
 * Validates a Polish ID card number. The function verifies that the number matches
 * a specific pattern (`AAA XXXXXX` where each `A` is any letter a-z and each `X` is any digit)
 * and validates the control digit based on a checksum calculation. Any dashes or
 * whitespace are ignored.
 *
 * @param {string} number - The ID card number as a string.
 * @returns {boolean} `true` if the ID card number is valid; `false` otherwise.
 */
export declare function isIdCardNumberValid(number: string): boolean;
/**
 * Validates a Polish ID card number. The function verifies that the number matches
 * a specific pattern (`AAA XXXXXX` where each `A` is any letter a-z and each `X` is any digit)
 * and validates the control digit based on a checksum calculation. Any dashes or
 * whitespace are ignored.
 *
 * @param {string} number - The ID card number as a string.
 * @returns {boolean} `true` if the ID card number is invalid; `false` otherwise.
 */
export declare const isIdCardNumberInvalid: (number: string) => boolean;