AdminPageFramework_CSS::getDefaultCSSIE PHP Method

    public static function getDefaultCSSIE()
    {
        return '';
    }

 private function _getIEStyleTag($oCaller, $sIDPrefix)
 {
     $_sStyleIE = $this->oUtil->addAndApplyFilters($oCaller, array("style_ie_common_admin_page_framework", "style_ie_common_{$this->oProp->sClassName}"), AdminPageFramework_CSS::getDefaultCSSIE());
     $_sStyleIE = $this->oUtil->isDebugMode() ? trim($_sStyleIE) : $this->oUtil->minifyCSS($_sStyleIE);
     return $_sStyleIE ? "<!--[if IE]><style type='text/css' id='" . esc_attr($sIDPrefix . "-ie") . "'>" . $_sStyleIE . "</style><![endif]-->" : '';
 }