{"ast_node_type":"other","tokens":[{"end":55,"kind":"keyword","start":0,"text":"[crate::sync::RwLock<T>"}]}
    [crate::sync::RwLock<T> where T: DynSend + DynSync]
    [Box<T, A> where T: ?Sized + DynSync, A: std::alloc::Allocator + DynSync]
    [crate::sync::WorkerLocal<T> where T: DynSend]