Convert class to trait

Author: GromNaN

generator/src/FluentStageFactoryGenerator.php

@@ -40,7 +40,7 @@ public function generate(GeneratorDefinition $definition): void
     private function createFluentFactoryClass(GeneratorDefinition $definition): PhpNamespace
     {
         $namespace = new PhpNamespace($definition->namespace);
-        $class = $namespace->addClass('FluentFactory');
+        $class = $namespace->addTrait('FluentFactoryTrait');
 
         $namespace->addUse(self::FACTORY_CLASS);
         $namespace->addUse(StageInterface::class);
@@ -78,7 +78,7 @@ private function createFluentFactoryClass(GeneratorDefinition $definition): PhpN
         return $namespace;
     }
 
-    private function addMethod(Method $factoryMethod, ClassType $class): void
+    private function addMethod(Method $factoryMethod, TraitType $class): void
     {
         // Non-public methods are not part of the API
         if (! $factoryMethod->isPublic()) {

src/Builder/Stage/FluentFactory.php renamed to src/Builder/Stage/FluentFactoryTrait.php

@@ -5,14 +5,17 @@
 namespace MongoDB\Tests\Builder;
 
 use MongoDB\Builder\Query;
-use MongoDB\Builder\Stage\FluentFactory;
+use MongoDB\Builder\Stage\FluentFactoryTrait;
 use MongoDB\Builder\Type\Sort;
 
 class FluentPipelineFactoryTest extends PipelineTestCase
 {
     public function testFluentPipelineFactory(): void
     {
-        $pipeline = (new FluentFactory())
+        $factory = new class {
+            use FluentFactoryTrait;
+        };
+        $pipeline = $factory
             ->match(x: Query::eq(1))
             ->project(_id: false, x: true)
             ->sort(x: Sort::Asc)