Represents a group of prefabs associated with specific scene labels, along with settings for how they should be spawned.
This struct encapsulates the necessary information for spawning prefabs based on anchor data.
When using ScalingMode.Custom, AlignMode.Custom, or SelectionMode.Custom the CustomPrefabScaling, CustomPrefabAlignment or CustomPrefabAlignment methods must be implemented in a custom class that extends either the AnchorPrfabSpawner or the ICustomPrefabAlignment interface directly.