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# paramDescriptor(forKeyword:)

Returns a descriptor for the receiver’s Apple event parameter identified by the specified keyword.

```
func paramDescriptor(forKeyword keyword: AEKeyword) -> NSAppleEventDescriptor?
```

## Parameters

`keyword`

A keyword (a four-character code) that identifies the parameter descriptor to obtain.

## Return Value

A descriptor for the specified keyword, or `nil` if an error occurs.

## Discussion

The receiver must be an Apple event.

---

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