declare namespace Ext {
    export namespace data {
        export interface PageMapConfig {
            keyFn?: CallableFunction;
            listeners?: object;
            maxSize?: number;
            pageSize?: number;
            rootProperty?: string;
        }

        export class PageMap extends Ext.util.LruCache  {
            public findBy(fn?: CallableFunction, scope?: object): object;
            public findIndexBy(fn?: CallableFunction, scope?: object): number;
            public getPageSize(): void;
            public getRootProperty(): void;
            public setPageSize(): void;
            public setRootProperty(): void;
        }
    }
}