declare namespace Ext {
    export namespace event {
        export namespace gesture {
            export interface DoubleTapConfig {
                moveDistance?: number;
                tapDistance?: number;
            }

            export class DoubleTap extends Ext.event.gesture.SingleTouch  {
                public getMoveDistance(): void;
                public getTapDistance(): void;
                public setMoveDistance(): void;
                public setTapDistance(): void;
            }
        }
    }
}