    /**
     * Creates the base structure of CheckboxGroup.
     * @member Ext.form.CheckboxGroup
     */
    @mixin extjs-form-checkboxgroup {

        .#{$prefix}form-checkboxgroup-body {
            padding: 1px 4px 1px 4px;
        }

        .#{$prefix}form-invalid {
            .#{$prefix}form-checkboxgroup-body {
                border: 1px solid #c30!important;
                background: transparent repeat-x bottom;
                background-image: theme-background-image($theme-name, 'grid/invalid_line.gif');
                padding: 1px 3px 0 3px;
            }
        }

        .#{$prefix}check-group-alt {
            background: adjust-color($base-color, $hue: 2.667deg, $saturation: -7.168%, $lightness: 3.725%);

            border-top:1px dotted adjust-color($base-color, $hue: 17.193deg, $saturation: -40.827%, $lightness: -9.412%);
            border-bottom:1px dotted adjust-color($base-color, $hue: 17.193deg, $saturation: -40.827%, $lightness: -9.412%);
        }

        .#{$prefix}form-check-group-label {
            color: #333;

            border-bottom: 1px solid #333;

            margin: 0 30px 5px 0;
            padding: 2px;
        }
    }