Formatted code

src/editor/js/structures/graph/graphelement.ts

-import {Graph} from "./graph";
-import {SerializableItem} from "../helper/serializableitem";
+import { Graph } from "./graph";
+import { SerializableItem } from "../helper/serializableitem";
 
 export class GraphElement extends SerializableItem {
     protected isNode: boolean;
@@ -27,7 +27,7 @@ export class GraphElement extends SerializableItem {
      * @returns True, if successful.
      */
     public delete(): boolean {
-        throw new Error("Function \"delete()\" has not been implemented.");
+        throw new Error('Function "delete()" has not been implemented.');
     }
 
     /**
@@ -36,7 +36,7 @@ export class GraphElement extends SerializableItem {
      * @returns True, if successful.
      */
     public add(graph: Graph = this.graph): boolean {
-        throw new Error("Function \"add(graph)\" has not been implemented.");
+        throw new Error('Function "add(graph)" has not been implemented.');
     }
 
     /**
@@ -44,6 +44,8 @@ export class GraphElement extends SerializableItem {
      * @returns Filtered object.
      */
     public getCleanInstance(): any {
-        throw new Error("Function \"getCleanInstance()\" has not been implemented.");
+        throw new Error(
+            'Function "getCleanInstance()" has not been implemented.'
+        );
     }
-}
+}
\ No newline at end of file