A persisted child record paired with its index in the flat body.structure array it lives in. Threaded down from BodyStructure so every entity knows the flat index its update helpers must address.
body.structure
The persisted child data shape.
The persisted child data.
The child's zero-based index in its flat structure array.
A persisted child record paired with its index in the flat
body.structurearray it lives in. Threaded down from BodyStructure so every entity knows the flat index its update helpers must address.