declare module '@ember/array/lib/make-array' {
  /**
     @module @ember/array
    */
  /**
     Forces the passed object to be part of an array. If the object is already
     an array, it will return the object. Otherwise, it will add the object to
     an array. If object is `null` or `undefined`, it will return an empty array.

     ```javascript
     import { makeArray } from '@ember/array';
     import ArrayProxy from '@ember/array/proxy';

     makeArray();            // []
     makeArray(null);        // []
     makeArray(undefined);   // []
     makeArray('lindsay');   // ['lindsay']
     makeArray([1, 2, 42]);  // [1, 2, 42]

     let proxy = ArrayProxy.create({ content: [] });

     makeArray(proxy) === proxy;  // false
     ```

     @method makeArray
     @static
     @for @ember/array
     @param {Object} obj the object
     @return {Array}
     @private
     */
  function makeArray<T, TT>(obj: T): T extends TT[] ? T : T extends null | undefined ? [] : [T];
  export default makeArray;
}