diff --git a/example-project/src/MockLanguageServiceHost.ts b/example-project/src/MockLanguageServiceHost.ts
new file mode 100644
index 0000000..8e6fd01
--- /dev/null
+++ b/example-project/src/MockLanguageServiceHost.ts
@@ -0,0 +1,39 @@
+import * as ts from "typescript";
+
+export class MockLanguageServiceHost implements ts.LanguageServiceHost {
+	constructor(
+		private readonly files: Map<string, string>,
+		private readonly compilationSettings: ts.CompilerOptions
+	) {}
+
+	getScriptFileNames(): string[] {
+		return [...this.files.keys()];
+	}
+
+	getScriptVersion(fileName: string): string {
+		return ""; // our files don't change
+	}
+
+	getScriptSnapshot(fileName: string): ts.IScriptSnapshot | undefined {
+		const content = this.files.get(fileName);
+		if (!content) {
+			return undefined;
+		}
+		return {
+			dispose() {},
+			getChangeRange: () => undefined,
+			getLength: () => content.length,
+			getText: (start, end) => content.substr(start, end - start),
+		};
+	}
+
+	getCompilationSettings(): ts.CompilerOptions {
+		return this.compilationSettings;
+	}
+	getCurrentDirectory(): string {
+		return "/";
+	}
+	getDefaultLibFileName(options: ts.CompilerOptions): string {
+		return ts.getDefaultLibFileName(options);
+	}
+}
diff --git a/example-project/src/index.ts b/example-project/src/index.ts
index ecc00ac..cfb42be 100644
--- a/example-project/src/index.ts
+++ b/example-project/src/index.ts
@@ -7,92 +7,178 @@ import {
 } from "@hediet/node-reload";
 enableHotReload();
 
-/*
 import {
 	registerAll,
 	CommonDataTypes,
 } from "@hediet/debug-visualizer-data-extraction";
+import { MockLanguageServiceHost } from "./MockLanguageServiceHost";
+
 registerAll();
-*/
 
 registerUpdateReconciler(module);
 
+function getClosure<T>(
+	root: T,
+	edgeSelector: (item: T) => { item: T; edgeLabel: string }[],
+	labelSelector: (item: T) => string
+): CommonDataTypes.GraphData {
+	const r: CommonDataTypes.GraphData = {
+		kind: {
+			graph: true,
+		},
+		nodes: [],
+		edges: [],
+	};
+	let idCounter = 1;
+	const ids = new Map<T, string>();
+	function getId(item: T): string {
+		let id = ids.get(item);
+		if (!id) {
+			id = (idCounter++).toString();
+			ids.set(item, id);
+		}
+		return id;
+	}
+
+	const queue = new Array<T>(root);
+	const processed = new Set<T>();
+
+	while (queue.length > 0) {
+		const item = queue.shift()!;
+		if (processed.has(item)) {
+			continue;
+		}
+		processed.add(item);
+		const edges = edgeSelector(item);
+		const fromId = getId(item);
+		r.nodes.push({ id: fromId, label: labelSelector(item) });
+		for (const e of edges) {
+			const toId = getId(e.item);
+			r.edges.push({
+				from: fromId,
+				to: toId,
+				label: e.edgeLabel,
+			});
+			if (!processed.has(e.item)) {
+				queue.push(e.item);
+			}
+		}
+	}
+	return r;
+}
+
+let id = 0;
+class DoubleLinkedList {
+	public readonly id = (id++).toString();
+	constructor(public name: string) {}
+
+	next: DoubleLinkedList | undefined;
+	prev: DoubleLinkedList | undefined;
+
+	public setNext(val: DoubleLinkedList): void {
+		val.prev = this;
+		this.next = val;
+	}
+
+	toData(): CommonDataTypes.GraphData {
+		return getClosure<DoubleLinkedList>(
+			this,
+			r =>
+				[
+					{ item: r.next!, edgeLabel: "next" },
+					{ item: r.prev!, edgeLabel: "prev" },
+				].filter(r => !!r.item),
+			item => item.name
+		);
+	}
+}
+
 @hotClass(module)
 class Main {
 	run() {
-		const sf = ts.createSourceFile(
-			"test",
-			`
+		const mainFile = {
+			name: "main.ts",
+			content: `
 class Test1 {
+	public foo(a: number) {
+	}
 }
-class Test2 {
-}
-class Test1 {
-}
-class Test2 {
-}
-class Test1 {
-}
-class Test2 {
-}
-class Test1 {
-}
-class Test2 {
-}
-class Test1 {
-}
-class Test2 {
-}
-class Test1 {
-}
-class Test2 {
-}
-class Test1 {
-}
-class Test2 {
-}
-class Test1 {
-}
-class Test2 {
-}
-class Test1 {
-}
-class Test2 {
-}
-class Test1 {
-}
-class Test2 {
-}
-class Test1 {
-}
-class Test2 {
-}
-class Test1 {
-}
-class Test2 {
-}
-class Test1 {
-}
-class Test2 {
-}
-class Test1 {
-}
-class Test2 {
-}
-`,
-			ts.ScriptTarget.Latest,
-			true
+		`,
+		};
+		const files = new Map<string, string>([
+			[mainFile.name, mainFile.content],
+		]);
+		const serviceHost = new MockLanguageServiceHost(files, {});
+		const baseService = ts.createLanguageService(
+			serviceHost,
+			ts.createDocumentRegistry()
 		);
-		let myValue: any = sf.statements[0];
-		myValue = sf.statements[1];
+		const prog = baseService.getProgram()!;
+
+		const identifiers = new Array<ts.Identifier>();
+		function traverse(node: ts.Node) {
+			if (ts.isIdentifier(node)) identifiers.push(node);
+			node.forEachChild(traverse);
+		}
+		traverse(prog.getSourceFiles()[0]);
+
+		const c = prog.getTypeChecker();
+		let myValue = undefined;
+		const sf = prog.getSourceFiles()[0];
 		myValue = sf.getText();
+		myValue = {
+			sf,
+			fn: (n: ts.Node) => {
+				try {
+					const t = c.getTypeAtLocation(n);
+					return t ? c.typeToString(t) : undefined;
+				} catch (e) {
+					return "" + e;
+				}
+			},
+		};
+		myValue = {
+			sf,
+			fn: (n: ts.Node) => {
+				try {
+					const t = c.getSymbolAtLocation(n);
+					return t ? ts.SymbolFlags[t.flags] : undefined;
+				} catch (e) {
+					return "" + e;
+				}
+			},
+		};
+
+		debugger;
+		for (const ident of identifiers) {
+			const s = c.getSymbolAtLocation(ident);
+			myValue = ident;
+		}
+
+		const first = (myValue = new DoubleLinkedList("1"));
+		myValue.setNext(new DoubleLinkedList("2"));
+		myValue.next!.setNext(new DoubleLinkedList("3"));
+		myValue.next!.next!.setNext(new DoubleLinkedList("4"));
+
+		let last: DoubleLinkedList | undefined = undefined;
+		while (myValue) {
+			myValue.prev = myValue.next;
+			myValue.next = last;
+			last = myValue;
+			myValue = myValue.prev;
+		}
+		myValue = first;
+
 		myValue = {
 			kind: { text: true, svg: true },
-			text: `<svg height="210" width="500">
-		<polygon points="100,10 40,198 190,78 10,78 160,198" style="fill:lime;stroke:purple;stroke-width:5;fill-rule:nonzero;"/>
-		Sorry, your browser does not support inline SVG.
-	  </svg>
-	  `,
+			text: `
+				<svg height="210" width="500">
+					<polygon
+						points="100,10 40,198 190,78 10,78 160,198"
+						style="fill:lime;stroke:purple;stroke-width:5;fill-rule:nonzero;"
+					/>
+				</svg>
+	  		`,
 		};
 	}
 }