public function reverse_left_and_right_4value_radius_shorthands($property, $value) {
		$shorthands = & $this->parser->data['csstidy']['radius_shorthands'];
		if (isset($shorthands[$property])) {
			$v = $this->dissolve_4value_radius_shorthands($property, $value);
			if ($v[$shorthands[$property][0]] !== $v[$shorthands[$property][1]]
			  or $v[$shorthands[$property][2]] !== $v[$shorthands[$property][3]]) {
				$r = array(
					$shorthands[$property][0] => $v[$shorthands[$property][1]],
					$shorthands[$property][1] => $v[$shorthands[$property][0]],
					$shorthands[$property][2] => $v[$shorthands[$property][3]],
					$shorthands[$property][3] => $v[$shorthands[$property][2]],
				);
				$v = $this->merge_4value_radius_shorthands($r);
				if (isset($v[$property])) {
					return $v[$property];
				}
			}
		}
		return $value;
	}