Add group name to membership

src/Data/Membership.php

@@ -30,6 +30,9 @@ class Membership extends DataTransferObject {
     #[MapFrom('untergliederungId')]
     public int $subactivityId;
 
+    #[MapFrom('gruppierung')]
+    public ?string $group;
+
     public function toNami(): array
     {
         return [

tests/Unit/Api/MembershipTest.php

@@ -23,6 +23,7 @@ class MembershipTest extends TestCase
                 'gruppierungId' => 1000,
                 'taetigkeitId' => 15,
                 'untergliederungId' => 16,
+                'gruppierung' => '::group::',
             ]);
 
         $membership = $this->login()->membership(6, 10);
@@ -34,6 +35,7 @@ class MembershipTest extends TestCase
         $this->assertSame(1000, $membership->groupId);
         $this->assertSame(15, $membership->activityId);
         $this->assertSame(16, $membership->subactivityId);
+        $this->assertSame('::group::', $membership->group);
     }
 
     public function testFetchesMembership(): void