/**
 * `typeof` "symbol" alias.
 *
 * @category Primitives
 * @example
 * ```typescript
 * isSymbol(Symbol("Vangware")); // true
 * isSymbol(Symbol.iterator); // true
 * isSymbol("Vangware"); // false
 * ```
 * @param input Value to check.
 * @returns Returns `true` if value is a `symbol`, `false` otherwise.
 */
export declare const isSymbol: (input: unknown) => input is symbol;