declare namespace Ext {
    export namespace mixin {
        export interface QueryableConfig {
        }

        export class Queryable extends Ext.Base  {
            public child(selector?: string | Ext.Component): Ext.Component;
            public down(selector?: string | Ext.Component): Ext.Component;
            public query(selector?: string): Ext.Component[];
            public queryBy(fn?: CallableFunction, scope?: object): Ext.Component[];
            public queryById(id?: string): Ext.Component;
            public visitPostOrder(selector?: object, fn?: CallableFunction, scope?: object, extraArgs?: []): void;
            public visitPreOrder(selector?: object, fn?: CallableFunction, scope?: object, extraArgs?: []): void;
        }
    }
}