declare global {
  /**
   * Returns `true` if the value is classified as a boolean primitive or object.
   * @param value The value to check.
   *
   * @example
   * ```typescript
   * isBoolean(true); // => true
   * isBoolean(false); // => true
   * isBoolean(new Boolean(true)); // => true
   * isBoolean(''); // => false
   * ```
   */
  function isBoolean(value: unknown): value is boolean | Boolean;
}
export {};
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