{"ast_node_type":"other","tokens":[{"end":61,"kind":"keyword","start":0,"text":"|"}]}
            | MutatingUse(MutatingUseContext::RawBorrow) => {
            | MutatingUse(MutatingUseContext::Borrow)
                trace!("local {:?} can't be propagated because it's used: {:?}", local, context);