declare namespace Ext {
    export namespace grid {
        export namespace plugin {
            export interface ClipboardConfig {
                formats?: object;
                id?: string;
                memory?: string | string[];
                pluginId?: string;
                source?: string | string[];
                stateEvents?: string | [];
                system?: string;
            }

            export class Clipboard extends Ext.plugin.AbstractClipboard  {
            }
        }
    }
}