Make AbstractAnnotation::$_context non-nullable (#2008)

Author: krissss

src/Annotations/AbstractAnnotation.php

@@ -35,7 +35,7 @@ abstract class AbstractAnnotation implements \JsonSerializable
      */
     public $attachables = Generator::UNDEFINED;
 
-    public ?Context $_context;
+    public Context $_context;
 
     /**
      * Annotations that couldn't be merged by mapping or postprocessing.

src/Processors/Concerns/DocblockTrait.php

@@ -29,10 +29,6 @@ trait DocblockTrait
      */
     public function isDocblockRoot(OA\AbstractAnnotation $annotation): bool
     {
-        if (!$annotation->_context) {
-            return true;
-        }
-
         if (1 == count($annotation->_context->annotations)) {
             return true;
         }