/**
 * Finds the most frequently occurring value(s) in an array
 * @param array - Array of numbers to find mode for
 * @returns Array of mode values (can be multiple values if there are ties)
 * @example
 * mode([1, 2, 2, 3, 3, 3]); // [3]
 * mode([1, 2, 2, 3, 3]); // [2, 3]
 * mode([1, 2, 3]); // [1, 2, 3]
 */
export declare const mode: (array: number[]) => number[];