{"ast_node_type":"import","tokens":[{"end":117,"kind":"keyword","start":0,"text":"//"}]}
                // the vtable is exactly in the `[ptr_size..2*ptr_size]` bytes. So we can use it without branching on
                // `&T`, `&mut T`, `Box<T>`, `Rc<T>`, `Arc<T>`, and `Pin<P>` where `P` is one of possible receivers,
                // the type.