declare module '@ember/object/promise-proxy-mixin' {
  import Mixin from '@ember/object/mixin';
  /**
      A low level mixin making ObjectProxy promise-aware.

      ```javascript
      import { resolve } from 'rsvp';
      import $ from 'jquery';
      import ObjectProxy from '@ember/object/proxy';
      import PromiseProxyMixin from '@ember/object/promise-proxy-mixin';

      let ObjectPromiseProxy = ObjectProxy.extend(PromiseProxyMixin);

      let proxy = ObjectPromiseProxy.create({
        promise: resolve($.getJSON('/some/remote/data.json'))
      });

      proxy.then(function(json){
         // the json
      }, function(reason) {
         // the reason why you have no json
      });
      ```

      the proxy has bindable attributes which
      track the promises life cycle

      ```javascript
      proxy.get('isPending')   //=> true
      proxy.get('isSettled')  //=> false
      proxy.get('isRejected')  //=> false
      proxy.get('isFulfilled') //=> false
      ```

      When the $.getJSON completes, and the promise is fulfilled
      with json, the life cycle attributes will update accordingly.
      Note that $.getJSON doesn't return an ECMA specified promise,
      it is useful to wrap this with an `RSVP.resolve` so that it behaves
      as a spec compliant promise.

      ```javascript
      proxy.get('isPending')   //=> false
      proxy.get('isSettled')   //=> true
      proxy.get('isRejected')  //=> false
      proxy.get('isFulfilled') //=> true
      ```

      As the proxy is an ObjectProxy, and the json now its content,
      all the json properties will be available directly from the proxy.

      ```javascript
      // Assuming the following json:
      {
        firstName: 'Stefan',
        lastName: 'Penner'
      }

      // both properties will accessible on the proxy
      proxy.get('firstName') //=> 'Stefan'
      proxy.get('lastName')  //=> 'Penner'
      ```

      @class PromiseProxyMixin
      @public
    */
  interface PromiseProxyMixin<T> {
    /**
          If the proxied promise is rejected this will contain the reason
          provided.
      
          @property reason
          @default null
          @public
        */
    reason: unknown;
    /**
          Once the proxied promise has settled this will become `false`.
      
          @property isPending
          @default true
          @public
        */
    readonly isPending: boolean;
    /**
          Once the proxied promise has settled this will become `true`.
      
          @property isSettled
          @default false
          @public
        */
    readonly isSettled: boolean;
    /**
          Will become `true` if the proxied promise is rejected.
      
          @property isRejected
          @default false
          @public
        */
    isRejected: boolean;
    /**
          Will become `true` if the proxied promise is fulfilled.
      
          @property isFulfilled
          @default false
          @public
        */
    isFulfilled: boolean;
    /**
          The promise whose fulfillment value is being proxied by this object.
      
          This property must be specified upon creation, and should not be
          changed once created.
      
          Example:
      
          ```javascript
          import ObjectProxy from '@ember/object/proxy';
          import PromiseProxyMixin from '@ember/object/promise-proxy-mixin';
      
          ObjectProxy.extend(PromiseProxyMixin).create({
            promise: <thenable>
          });
          ```
      
          @property promise
          @public
        */
    promise: Promise<T>;
    /**
          An alias to the proxied promise's `then`.
      
          See RSVP.Promise.then.
      
          @method then
          @param {Function} callback
          @return {RSVP.Promise}
          @public
        */
    then: this['promise']['then'];
    /**
          An alias to the proxied promise's `catch`.
      
          See RSVP.Promise.catch.
      
          @method catch
          @param {Function} callback
          @return {RSVP.Promise}
          @since 1.3.0
          @public
        */
    catch: this['promise']['catch'];
    /**
          An alias to the proxied promise's `finally`.
      
          See RSVP.Promise.finally.
      
          @method finally
          @param {Function} callback
          @return {RSVP.Promise}
          @since 1.3.0
          @public
        */
    finally: this['promise']['finally'];
  }
  const PromiseProxyMixin: Mixin;
  export default PromiseProxyMixin;
}