Function apply_node_subtree_removal 

pub fn apply_node_subtree_removal(
    document: &mut Document,
    plan: &NodeSubtreeRemovalPlan,
) -> Result<(), AssemblyError>

Apply a planned subtree projection transactionally.

All final track, mesh-instance, and skin references are checked before the document is changed. Source-native skeleton projection is cleared: after authored node deletion it cannot remain a complete account of the new normalized hierarchy.

Errors

Returns AssemblyError if the plan is stale, a forbidden reference survives, or the projected document is structurally invalid. document is unchanged on every error.