public function removeHandler($sTarget, $sEvent, $sHandler)
    {
        return $this->addCommand(
            array(
                'cmd' => 'rh',
                'id' => trim((string)$sTarget, " \t"),
                'prop' => trim((string)$sEvent, " \t")
            ),
            trim((string)$sHandler, " \t\n")
        );
    }