puppeteer/new-docs/puppeteer.protocol.heapprofiler.lastseenobjectidevent.md

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[Home](./index.md) &gt; [puppeteer](./puppeteer.md) &gt; [Protocol](./puppeteer.protocol.md) &gt; [HeapProfiler](./puppeteer.protocol.heapprofiler.md) &gt; [LastSeenObjectIdEvent](./puppeteer.protocol.heapprofiler.lastseenobjectidevent.md)
## Protocol.HeapProfiler.LastSeenObjectIdEvent interface
If heap objects tracking has been started then backend regularly sends a current value for last seen object id and corresponding timestamp. If the were changes in the heap since last event then one or more heapStatsUpdate events will be sent before a new lastSeenObjectId event.
<b>Signature:</b>
```typescript
export interface LastSeenObjectIdEvent
```
## Properties
| Property | Type | Description |
| --- | --- | --- |
| [lastSeenObjectId](./puppeteer.protocol.heapprofiler.lastseenobjectidevent.lastseenobjectid.md) | [integer](./puppeteer.protocol.integer.md) | |
| [timestamp](./puppeteer.protocol.heapprofiler.lastseenobjectidevent.timestamp.md) | number | |