declare namespace Ext {
    export interface ComponentQueryConfig {
    }

    export class ComponentQuery extends Ext.Base  {
        public is(component?: Ext.Component, selector?: string, root?: Ext.Component): boolean;
        public query(selector?: string, root?: Ext.container.Container): Ext.Component[];
        public visitPostOrder(selector?: object, root?: string, fn?: CallableFunction, scope?: object, extraArgs?: []): void;
        public visitPreOrder(selector?: object, root?: string, fn?: CallableFunction, scope?: object, extraArgs?: []): void;
    }
}