Xcode 10.2 support for macOS Content Caching

In the release notes of Xcode 10.2 (https://developer.apple.com/documentation/xcode_release_notes/xcode_10_2_release_notes/), there is a new feature under General secion:

Xcode now supports downloading using macOS content caching. For information about macOS content caching, see About content caching on Mac. (12926899)


Does this mean Xcode simulators can be downloaded via Content Caching, or Xcode.app it self is cachable? What are the implications of this new feature, such as how a typical workflow may be affected by it?