<!--
{
  "availability" : [
    "macOS: -"
  ],
  "documentType" : "symbol",
  "framework" : "AppKit",
  "identifier" : "/documentation/AppKit/NSBrowserDelegate/browser(_:isColumnValid:)",
  "metadataVersion" : "0.1.0",
  "role" : "Instance Method",
  "symbol" : {
    "kind" : "Instance Method",
    "modules" : [
      "AppKit"
    ],
    "preciseIdentifier" : "c:objc(pl)NSBrowserDelegate(im)browser:isColumnValid:"
  },
  "title" : "browser(_:isColumnValid:)"
}
-->

# browser(_:isColumnValid:)

Returns whether the contents of the specified column are valid.

```
@MainActor optional func browser(_ sender: NSBrowser, isColumnValid column: Int) -> Bool
```

## Parameters

`sender`

The browser containing the column to validate.

`column`

The index of the column to validate.

## Return Value

<doc://com.apple.documentation/documentation/Swift/true> if the column’s contents are valid; otherwise, <doc://com.apple.documentation/documentation/Swift/false>. If <doc://com.apple.documentation/documentation/Swift/false> is returned, `sender` reloads the column.

## Discussion

This method is invoked in response to the [`validateVisibleColumns()`](/documentation/AppKit/NSBrowser/validateVisibleColumns())method of [`NSBrowser`](/documentation/AppKit/NSBrowser) being sent to `sender`.

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)