import type { ExtendedObject } from '../../ExtendedObject/index.js';
declare global {
  /**
   * Creates an object with additional methods.
   * @param o The object to extend.
   *
   * @example
   * ```typescript
   * const obj = { a: 1, b: 2, c: 3 };
   * ex(obj).filter(([k, v]) => v % 2 === 0).mapKeys((k) => k.toUpperCase()); // => { B: 2 }
   * ex(obj).omit('a', 'b').size(); // => 1
   * ```
   */
  function ex<const O extends object>(o: O): ExtendedObject<O>;
}
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