{"ast_node_type":"other","tokens":[{"end":98,"kind":"keyword","start":0,"text":"//"}]}
                // There can be extra fields as long as they don't change their type or are 1-ZST.
                // Unsizing of generic struct with pointer fields, like `Arc<T>` -> `Arc<Trait>`.
                // There might also be no field that actually needs unsizing.