# Sandbox.UI.DockItem

A registered dock panel. Its content survives tab changes, closing and moving between hosts.

- Kind: class
- Namespace: `Sandbox.UI`
- Assembly: `Sandbox.Engine`
- Modifiers: sealed

## Properties

- [`CanClose`](/api/Sandbox.UI.DockItem/CanClose): Whether the panel can be closed.
- [`Content`](/api/Sandbox.UI.DockItem/Content): The panel owned by the host, or null until a factory registration is opened.
- [`Icon`](/api/Sandbox.UI.DockItem/Icon): Optional Material icon shown before the title.
- [`Id`](/api/Sandbox.UI.DockItem/Id): Stable ID used in saved layouts.
- [`Title`](/api/Sandbox.UI.DockItem/Title): Title shown on the tab.