declare namespace Ext {
    export namespace grid {
        export namespace selection {
            export interface CellsConfig {
            }

            export class Cells extends Ext.grid.selection.Selection  {
                public isCells?: boolean;
                public contains(cellContext?: Ext.grid.CellContext): boolean;
                public getFirstColumnIndex(): number;
                public getFirstRowIndex(): number;
                public getLastColumnIndex(): number;
                public getLastRowIndex(): number;
            }
        }
    }
}