+ * @param $filterInstance An instance of a filter
+ * @return void
+ */
+ public function addPreFilter (Filterable $filterInstance) {
+ // Add the pre filter
+ $this->preRegistrationFilter->addFilter($filterInstance);
+ }
+
+ /**
+ * Adds a filter to the post filter chain
+ *
+ * @param $filterInstance An instance of a filter
+ * @return void