/**
 * Get an integer value from a string or number
 *
 * @remarks
 *
 * This function attempts to parse a string or number into an integer.
 * If the input is a number, it returns it directly.
 * If the input is a string, it tries to parse it as an integer.
 * If the string is empty or cannot be parsed into a valid integer, it returns undefined.
 *
 * @param value The value to parse, which can be a string or a number.
 * @returns The parsed integer value or undefined if parsing fails.
 */
export declare const getInteger: (value?: string | number) => number | undefined;