Idk what changed

Author: JanHolger

src/main/java/org/javawebstack/graph/GraphMapper.java

@@ -57,14 +57,17 @@ public boolean shouldSkipField(FieldAttributes fieldAttributes) {
                 public boolean shouldSkipClass(Class<?> aClass) { return false;  }
             });
         }
-        return builder.create();
+        gson = builder.create();
+        return gson;
     }
 
     public GraphElement toGraph(Object object){
         return GraphElement.fromJson(gson().toJsonTree(object));
     }
 
     public <T> T fromGraph(GraphElement element, Class<T> type){
+        if(element == null)
+            return null;
         return gson().fromJson(element.toJson(), type);
     }