{"ast_node_type":"other","tokens":[{"end":68,"kind":"keyword","start":0,"text":"[Vec<T,"}]}
    [Vec<T, A> where T: DynSync, A: std::alloc::Allocator + DynSync]
    [std::collections::BTreeMap<K, V, A> where K: DynSync, V: DynSync, A: std::alloc::Allocator + Clone + DynSync]
    [Box<T, A> where T: ?Sized + DynSync, A: std::alloc::Allocator + DynSync]