declare namespace Ext {
    export namespace util {
        export interface SorterConfig {
            direction?: string;
            id?: any;
            property?: string;
            root?: string;
            sorterFn?: CallableFunction;
            transform?: CallableFunction;
        }

        export class Sorter extends Ext.Base  {
            public getDirection(): void;
            public getId(): void;
            public getProperty(): void;
            public getRoot(): void;
            public getSorterFn(): void;
            public getState(): object;
            public getTransform(): void;
            public serialize(): object;
            public setDirection(): void;
            public setId(): void;
            public setProperty(): void;
            public setRoot(): void;
            public setSorterFn(): void;
            public setTransform(): void;
            public toggle(): void;
            public static createComparator(sorters?: Ext.util.Sorter[] | Ext.util.Collection, nextFn?: object): CallableFunction;
        }
    }
}