declare namespace Ext {
    export namespace direct {
        export interface PollingProviderConfig {
            baseParams?: object;
            headers?: object;
            id?: string;
            interval?: number;
            listeners?: object;
            pollFn?: string | CallableFunction;
            relayedEvents?: string[];
            timeout?: number;
            url?: string | CallableFunction;
        }

        export class PollingProvider extends Ext.direct.JsonProvider  {
        }
    }
}