    /**
     * @class Ext.grid.column.RowNumberer
     */

    /**
     * @var {number}
     * The horizontal space before the number in the RowNumberer cell
     */
    $grid-row-numberer-cell-spacing-before: 3px !default;

    /**
     * @var {number}
     * The horizontal space after the number in the RowNumberer cell
     */
    $grid-row-numberer-cell-spacing-after: 5px !default;

    // private
    $grid-row-numberer-cell-padding:
        top($grid-cell-inner-padding)
        $grid-row-numberer-cell-spacing-after
        bottom($grid-cell-inner-padding)
        $grid-row-numberer-cell-spacing-before;