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# grantCapability:error:invalidationHandler:

Grants the specified capability to the process, invoking the handler when the capability becomes invalid.

```
- (id<BEProcessCapabilityGrant>) grantCapability:(BEProcessCapability *) capability error:(NSError **) error invalidationHandler:(void (^)()) invalidationHandler;
```

## Parameters

`capability`

The capability to grant.

`error`

If an error occurs, upon return contains an <doc://com.apple.documentation/documentation/Foundation/NSError> object that describes the problem. If you don’t want information about errors that happen, pass in `NULL`.

`invalidationHandler`

A block the system calls when the capability becomes invalid.

## Return Value

A [`BEProcessCapabilityGrant`](/documentation/BrowserEngineKit/BEProcessCapabilityGrant) object that represents the granted capability, or `nil` if an error occurs.

## Discussion

When the process no longer needs the capability, call [`invalidate`](/documentation/BrowserEngineKit/BEProcessCapabilityGrant/invalidate) on the returned object.

---

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