Replace layout attributes (Layoutable) with general purpose Attributes

Author: clue

src/MaximumMatching/Flow.php

@@ -30,8 +30,8 @@ public function getEdges()
         // create temporary flow graph with supersource and supersink
         $graphFlow = $this->graph->createGraphCloneEdgeless();
 
-        $superSource = $graphFlow->createVertex()->setLayoutAttribute('label', 's*');
-        $superSink   = $graphFlow->createVertex()->setLayoutAttribute('label', 't*');
+        $superSource = $graphFlow->createVertex();
+        $superSink   = $graphFlow->createVertex();
 
         $groups = $alg->getGroups();
         $groupA = $groups[0];

src/MinimumCostFlow/CycleCanceling.php

@@ -19,8 +19,8 @@ public function createGraph()
         // create resulting graph with supersource and supersink
         $resultGraph = $this->graph->createGraphClone();
 
-        $superSource = $resultGraph->createVertex()->setLayoutAttribute('label', 's*');
-        $superSink   = $resultGraph->createVertex()->setLayoutAttribute('label', 't*');
+        $superSource = $resultGraph->createVertex();
+        $superSink   = $resultGraph->createVertex();
 
         $sumBalance = 0;