protected function replaceAttribute(DOMAttr $attribute, $expr, $value)
	{
		AVTHelper::replace(
			$attribute,
			function ($token) use ($expr, $value)
			{
				// Test whether this expression is the one we're looking for
				if ($token[0] === 'expression' && $token[1] === $expr)
				{
					// Replace the expression with the value (as a literal)
					$token = ['literal', $value];
				}

				return $token;
			}
		);
	}