.#{$prefix}grid-row-expander {
    background-image: theme-background-image('grid/group-collapse');

    width: $row-expander-width;
    height: $row-expander-height;

    // This prevents IEQuirks from collapsing the icon's margin-top into the cell-inner's padding-top.
    // Without this, the icon moves upwards due to above collapsing effect.
    float: left;

    // This prevents IEquirks from stretching the icon div to accommodate the   at the grid cell's own specified line height.
    // Without this, the icon expands above its configured row-expander-height.
    line-height: 0;

    // Centers the icon within the standard sized row for the theme.
    margin: $row-expander-margin;
}

.#{$prefix}grid-row-collapsed {
    .#{$prefix}grid-row-expander {
        background-image: theme-background-image('grid/group-expand');
    }
}