# IGH_EventConsumer interface

Namespace: [Grasshopper.Kernel](https://developer.rhino3d.com/api/gh1/namespace/grasshopper.kernel.md) · Assembly: [Grasshopper](https://developer.rhino3d.com/api/gh1/assembly/grasshopper.md)

```cs
public interface IGH_EventConsumer
```

Implement this interface if you want to inter-operate with a GH_EventServer.

## Methods

- [IsRelevantEvent](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.igh-eventconsumer/isrelevantevent.md): Whenever a new object event is handled, this function will be called to determine whether it will cause an update.
- [PartialExpiration](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.igh-eventconsumer/partialexpiration.md): This method will be called by the GH_CustomEventServer to indicate one or more interesting object events can now be processed.
- [TotalExpiration](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.igh-eventconsumer/totalexpiration.md): This method will be called by the GH_CustomEventServer to indicate all interesting object events can now be processed.