public static function notSame($value1, $value2, $message = null, $propertyPath = null)
{
if ($value1 === $value2) {
$message = sprintf($message ?: 'Value "%s" is the same as expected value "%s".', static::stringify($value1), static::stringify($value2));
throw static::createException($value1, $message, static::INVALID_NOT_SAME, $propertyPath, array('expected' => $value2));
}
return true;
}