/**
 * Formats a number with a unit, automatically pluralizing the unit based on the count.
 *
 * If the `<property>count` is exactly 1, the singular `<property>unit` is used.
 * Otherwise, it either uses  the provided `<property>plural` form or calls
 * <code><reference>toPlural</reference>(<property>unit</property>)</code>
 * to generate one.
 *
 * @example
 * ```ts
 * quantify(1, "apple"); // "1 apple"
 * ```
 *
 * @example
 * ```ts
 * quantify(3, "apple"); // "3 apples"
 * ```
 *
 * @example
 * ```ts
 * quantify("02", "box"); // "02 boxes"
 * ```
 *
 * @example
 * ```ts
 * quantify(1, "child", "children"); // "1 child"
 * ```
 *
 * @example
 * ```ts
 * quantify(2, "child", "children"); // "2 children"
 * ```
 *
 * @example
 * ```ts
 * quantify(5, "CPU"); // "5 CPUs"
 * ```
 *
 * @param count Number of units, as a number or numeric string.
 * @param unit Label for the singular unit (e.g., "apple").
 * @param plural Optional plural label. If not provided, the unit is pluralized automatically.
 * @returns A formatted string in the form `x unit(s)`.
 */
export declare function quantify(count: number | string, unit: string, plural?: string): string;