public function __construct($name, $callable, array $options = array()) {
$this->name = $name;
$this->callable = $callable;
$this->options = array_merge(array(
'needs_environment' => false,
'needs_context' => false,
'is_safe' => null,
'is_safe_callback' => null,
'pre_escape' => null,
'preserves_safety' => null,
'node_class' => 'Twig_Node_Expression_Filter',
), $options);
}