From c3570ffd7e8004f93e8cc5f4349d02e890b67490 Mon Sep 17 00:00:00 2001
From: Samuel Georges <sam@daftspunk.com>
Date: Fri, 23 Jun 2017 08:11:41 +1000
Subject: [PATCH] The event emitter should not be a dependency Fixes #2938

---
 modules/backend/widgets/Form.php | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/modules/backend/widgets/Form.php b/modules/backend/widgets/Form.php
index 8a34c8521..a94264871 100644
--- a/modules/backend/widgets/Form.php
+++ b/modules/backend/widgets/Form.php
@@ -1018,11 +1018,19 @@ class Form extends WidgetBase
      */
     protected function applyFiltersFromModel()
     {
+        /*
+         * Standard usage
+         */
         if (method_exists($this->model, 'filterFields')) {
             $this->model->filterFields((object) $this->allFields, $this->getContext());
         }
 
-        $this->model->fireEvent('model.form.filterFields', [$this]);
+        /*
+         * Advanced usage
+         */
+        if (method_exists($this->model, 'fireEvent')) {
+            $this->model->fireEvent('model.form.filterFields', [$this]);
+        }
     }
 
     /**