declare namespace Ext {
    export namespace grid {
        export namespace filters {
            export interface FiltersConfig {
                id?: string;
                menuFilterText?: string;
                pluginId?: string;
                showMenu?: boolean;
                stateEvents?: string | [];
                stateId?: string;
            }

            export class Filters extends Ext.plugin.Abstract  {
                public filterCls?: string;
                public addFilter(filters?: object | object[] | Ext.util.Filter | Ext.util.Filter[]): void;
                public addFilters(filters?: []): void;
                public clearFilters(): void;
                public isStateful(): boolean;
            }
        }
    }
}