public sealed struct Sandbox.Package.PackageUsageStats.Group

Attributes are the bridge to pass information around the CPU to the GPU, like Variables, Textures or entire Buffers.

Making a custom node in C# is as easy as writing a static method with a special \[ActionGraphNode( id )\] attribute. You should also add \[Pure\] if you want your node to be an expression node - a node without signals.

You can add attributes to your Component's properties in C# to change how they look in the editor/inspector.

You can implement the ISceneMetadata interface in any Component that has data you'd like saved to Metadata. Metadata is data that can be accessed without needing to load a Scene or clone a Prefab (accessed via either the SceneFile or PrefabFile)

The scope based system works by creating a snapshot of a change set when the scope is entered and another one when the scope is disposed of. The system will automatically take care of restoring the state on undo/redo.