declare module '@ember/object/mixin' {
  /**
    @module @ember/object/mixin
    */
  import { INIT_FACTORY } from '@ember/-internals/container';
  export function applyMixin(
    obj: Record<string, any>,
    mixins: Array<Mixin | Record<string, unknown>>,
    _hideKeys?: boolean
  ): Record<string, any>;
  /**
      @method mixin
      @param obj
      @param mixins*
      @return obj
      @private
    */
  export function mixin(obj: object, ...args: any[]): object;
  /**
      The `Mixin` class allows you to create mixins, whose properties can be
      added to other classes. For instance,

      ```javascript
      import Mixin from '@ember/object/mixin';

      const EditableMixin = Mixin.create({
        edit() {
          console.log('starting to edit');
          this.set('isEditing', true);
        },
        isEditing: false
      });
      ```

      ```javascript
      import EmberObject from '@ember/object';
      import EditableMixin from '../mixins/editable';

      // Mix mixins into classes by passing them as the first arguments to
      // `.extend.`
      const Comment = EmberObject.extend(EditableMixin, {
        post: null
      });

      let comment = Comment.create({
        post: somePost
      });

      comment.edit(); // outputs 'starting to edit'
      ```

      Note that Mixins are created with `Mixin.create`, not
      `Mixin.extend`.

      Note that mixins extend a constructor's prototype so arrays and object literals
      defined as properties will be shared amongst objects that implement the mixin.
      If you want to define a property in a mixin that is not shared, you can define
      it either as a computed property or have it be created on initialization of the object.

      ```javascript
      // filters array will be shared amongst any object implementing mixin
      import Mixin from '@ember/object/mixin';
      import { A } from '@ember/array';

      const FilterableMixin = Mixin.create({
        filters: A()
      });
      ```

      ```javascript
      import Mixin from '@ember/object/mixin';
      import { A } from '@ember/array';
      import { computed } from '@ember/object';

      // filters will be a separate array for every object implementing the mixin
      const FilterableMixin = Mixin.create({
        filters: computed(function() {
          return A();
        })
      });
      ```

      ```javascript
      import Mixin from '@ember/object/mixin';
      import { A } from '@ember/array';

      // filters will be created as a separate array during the object's initialization
      const Filterable = Mixin.create({
        filters: null,

        init() {
          this._super(...arguments);
          this.set("filters", A());
        }
      });
      ```

      @class Mixin
      @public
    */
  export default class Mixin {
    /** @internal */
    static _disableDebugSeal?: boolean;
    /** @internal */
    mixins: Mixin[] | undefined;
    /** @internal */
    properties:
      | {
          [key: string]: any;
        }
      | undefined;
    /** @internal */
    ownerConstructor: any;
    /** @internal */
    _without: any[] | undefined;
    [INIT_FACTORY]?: null;
    /** @internal */
    constructor(
      mixins: Mixin[] | undefined,
      properties?: {
        [key: string]: any;
      }
    );
    /**
          @method create
          @for @ember/object/mixin
          @static
          @param arguments*
          @public
        */
    static create<M extends typeof Mixin>(...args: any[]): InstanceType<M>;
    /** @internal */
    static mixins(obj: object): Mixin[];
    /**
          @method reopen
          @param arguments*
          @private
          @internal
        */
    reopen(...args: Array<Mixin | Record<string, unknown>>): this;
    /**
          @method apply
          @param obj
          @return applied object
          @private
          @internal
        */
    apply(obj: object, _hideKeys?: boolean): Record<string, any>;
    /** @internal */
    applyPartial(obj: object): Record<string, any>;
    /**
          @method detect
          @param obj
          @return {Boolean}
          @private
          @internal
        */
    detect(obj: any): boolean;
    /** @internal */
    without(...args: any[]): Mixin;
    /** @internal */
    keys(): Set<string>;
    /** @internal */
    toString(): string;
  }
}