/**
 * Validates a doctor's identifier in Poland, ensuring it has 7 digits and passes a
 * checksum validation. Any characters other than digits will result in the identifier
 * being invalid.
 *
 * @param {string} number - The doctor's identification number as a string.
 * @returns {boolean} `true` if the doctor's number is valid; `false` otherwise.
 */
export declare function isDoctorNumberValid(number: string): boolean;
/**
 * Validates a doctor's identifier in Poland, ensuring it has 7 digits and passes a
 * checksum validation. Any characters other than digits will result in the identifier
 * being invalid.
 *
 * @param {string} number - The doctor's identification number as a string.
 * @returns {boolean} `true` if the doctor's number is invalid; `false` otherwise.
 */
export declare const isDoctorNumberInvalid: (number: string) => boolean;