foo.diff

diff --git a/src/Core/CustomMethods.php b/src/Core/CustomMethods.php
index f37be48..749b4d0 100644
--- a/src/Core/CustomMethods.php
+++ b/src/Core/CustomMethods.php
@@ -61,6 +61,10 @@ trait CustomMethods
 
         switch (true) {
             case isset($config['property']) : {
+                if (!empty($config['callSetOwnerFirst']) && !isset($this->{$config['property']})) {
+                    $this->getExtensionInstances();
+                }
+
                 $obj = $config['index'] !== null ?
                     $this->{$config['property']}[$config['index']] :
                     $this->{$config['property']};
diff --git a/src/Core/Extensible.php b/src/Core/Extensible.php
index cfc0310..1f84c3c 100644
--- a/src/Core/Extensible.php
+++ b/src/Core/Extensible.php
@@ -17,19 +17,7 @@ use SilverStripe\View\ViewableData;
  */
 trait Extensible
 {
-    use CustomMethods {
-        getExtraMethodConfig as getCustomMethodsConfig;
-    }
-
-    protected function getExtraMethodConfig($method)
-    {
-        $config = $this->getCustomMethodsConfig($method);
-        // Ensure extension instances are populated before being accessed
-        if (isset($config['property']) && $config['property'] === 'extension_instances') {
-            $this->getExtensionInstances();
-        }
-        return $config;
-    }
+    use CustomMethods;
 
     /**
      * An array of extension names and parameters to be applied to this object upon construction.