/**
 * @class Ext.selection.CheckboxModel
 */
 
/**
 * @var {number}
 * The horizontal space before the checkbox
 */
$checkbox-selection-model-cell-spacing-before: 5px !default;
 
/**
 * @var {number}
 * The horizontal space after the checkbox
 */
$checkbox-selection-model-cell-spacing-after: 5px !default;
 
// private 
$checkbox-selection-model-column-header-padding: 
    max(ceil(($grid-header-height - $form-checkbox-size) / 2), 0)
    $checkbox-selection-model-cell-spacing-after 
    max(floor(($grid-header-height - $form-checkbox-size) / 2), 0)
    $checkbox-selection-model-cell-spacing-before;
 
// private 
$checkbox-selection-model-cell-padding: 
    max(ceil(($grid-row-height - $form-checkbox-size) / 2), 0)
    $checkbox-selection-model-cell-spacing-after 
    max(floor(($grid-row-height - $form-checkbox-size) / 2), 0)
    $checkbox-selection-model-cell-spacing-before;