declare namespace Ext {
    export namespace layout {
        export namespace container {
            export namespace boxOverflow {
                export interface ScrollerConfig {
                    animateScroll?: boolean;
                    listeners?: object;
                    scrollDuration?: number;
                    scrollIncrement?: number;
                    scrollRepeatInterval?: number;
                    wheelIncrement?: number;
                }

                export class Scroller extends Ext.layout.container.boxOverflow.None  {
                    public getScrollPosition(): number;
                    public scrollToItem(item?: string | number | Ext.Component, animate?: boolean): void;
                }
            }
        }
    }
}