pub fn duplicate(world: &mut World, reg: &Registry, e: Entity) -> EntityExpand description
Deep-copies registered components of a non-transient subtree.
The copy is a sibling of the original; only the root gets a (Copy) suffix.
Runtime-only components are omitted and name-based references are not remapped.
Traversal terminates even for malformed cyclic input hierarchies.
ยงPanics
Panics when e is stale. The destination world must register every copied type.