declare namespace Ext {
    export namespace grid {
        export namespace plugin {
            export interface BufferedRendererConfig {
                id?: string;
                leadingBufferZone?: number;
                numFromEdge?: number;
                pluginId?: string;
                scrollToLoadBuffer?: number;
                stateEvents?: string | [];
                synchronousRender?: boolean;
                trailingBufferZone?: number;
            }

            export class BufferedRenderer extends Ext.plugin.Abstract  {
                public isBufferedRenderer?: boolean;
                public position?: number;
            }
        }
    }
}