diff --git a/src/Method/FormContext.php b/src/Method/FormContext.php
index 6b1feb0..78ecdda 100644
--- a/src/Method/FormContext.php
+++ b/src/Method/FormContext.php
@@ -25,14 +25,14 @@ class FormContext implements FormContextInterface
 
     public bool $formSkipCsrf = false;
 
+    protected array $formContextDefinedProperties = [];
+
     protected array $formContextCatchedMethods = [ 'POST', 'PUT', 'PATCH', 'DELETE', ];
 
     public ServerRequestInterface $formContextRequest;
     
     public ? ResponseInterface $formContextResponse = null;
 
-    public FormInterface $form;
-
     public function __construct(ServerRequestInterface $request, ? string $formName = null)
     {
         $this->formContextRequest = $request;
@@ -177,6 +177,7 @@ class FormContext implements FormContextInterface
         foreach($this->formContextValues as $property => $value) {
             if ($this->canWriteProperty($property)) {
                 $this->$property = $value;
+                $this->formContextDefinedProperties[$property] = true;
             }
         }
     }
@@ -188,4 +189,9 @@ class FormContext implements FormContextInterface
 
         return ! in_array(strtolower($property), $skipping) && property_exists($this, $property);
     }
+
+    protected function definedProperty(string $property) : bool
+    {
+        return $this->formContextDefinedProperties[$property] ?? false;
+    }
 }