{"ast_node_type":"other","tokens":[{"end":95,"kind":"keyword","start":0,"text":"//"}]}
    // `&RootDatabase -> &dyn OtherDatabase` cast will instantiate its drop glue in the vtable,
    // We use `ManuallyDrop` here because every codegen unit that contains a
    // which duplicates `Weak::drop` and `Arc::drop` tens of thousands of times, which makes