protected function isSafe($context)
	{
		// Test this attribute's filters
		$methodName = 'isSafe' . $context;
		foreach ($this->filterChain as $filter)
		{
			if ($filter->$methodName())
			{
				// If any filter makes it safe, we consider it safe
				return true;
			}
		}

		return !empty($this->markedSafe[$context]);
	}