Renamed GroupSourcesAttribut to MembershipsAttribut and Implemented\Optimized tests

application/src/Entity/Attribut/MembershipsAttributInterface.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace App\Entity\Attribut;
+
+use Doctrine\Common\Collections\Collection;
+use App\Entity\Source\Collection\MemberCollectionSourceInterface;
+
+/**
+ * @author kevinfrantz
+ */
+interface MembershipsAttributInterface
+{
+    /**
+     * @param Collection|MemberCollectionSourceInterface[] $groups
+     */
+    public function setMemberships(Collection $memberships): void;
+
+    /**
+     * @return Collection|MemberCollectionSourceInterface[]
+     */
+    public function getMemberships(): Collection;
+}