{"ast_node_type":"other","tokens":[{"end":45,"kind":"keyword","start":0,"text":"[crate::sync::RwLock<T>"}]}
    [crate::sync::RwLock<T> where T: DynSend]
    [Box<T, A> where T: ?Sized + DynSend, A: std::alloc::Allocator + DynSend]
    [crate::tagged_ptr::TaggedRef<'a, P, T> where 'a, P: Sync, T: Send + crate::tagged_ptr::Tag]