    /**
     * @class Ext.grid.plugin.RowExpander
     */

    /**
     * @var {number}
     * The height of the RowExpander icon
     */
    $row-expander-height: 11px !default;

    /**
     * @var {number}
     * The width of the RowExpander icon
     */
    $row-expander-width: 11px !default;

    /**
     * @var {number}
     * The horizontal space before the RowExpander icon
     */
    $row-expander-cell-spacing-before: 6px !default;

    /**
     * @var {number}
     * The horizontal space after the RowExpander icon
     */
    $row-expander-cell-spacing-after: 6px !default;

    /**
     * @var {string}
     * The cursor for the RowExpander icon
     */
    $row-expander-cursor: pointer !default;

    // private
    $row-expander-cell-padding:
        max(ceil(($grid-row-height - $row-expander-height) / 2), 0)
        $row-expander-cell-spacing-after
        max(floor(($grid-row-height - $row-expander-height) / 2), 0)
        $row-expander-cell-spacing-before;