A number of users have reported that they'd like syntax like the following in Zend_Form:

The idea is that they would like to selectively render specific metadata from the element or form.

This could be done fairly easily by using overloading. __call() could intercept methods beginning in 'render', and if the remainder of the method matches a decorator, would render that decorator.

As a sample implementation:

public function __call($method, $args)
{
    if ('render' == substr($method, 0, 6)) {
        $decoratorName = ucfirst(substr($method, 6));
        if (false !== ($decorator = $this->getDecorator($decoratorName))) {
            $seed = '';
            if (0 < count($args)) {
                $seed = array_shift($args);
            }
            return $decorator->render($seed);
        }
        require_once 'Zend/Form/Exception.php';
        throw new Zend_Form_Exception(sprintf('Decorator by name %s does not exist', $decoratorName));
    }
    require_once 'Zend/Form/Exception.php';
    throw new Zend_Form_Exception(sprintf('Method %s does not exist', $method));
}