pub type NodeSet = FxHashSet<ast::NodeId>;
pub type DefIdSet = FxHashSet<DefId>;
+pub type ItemLocalSet = FxHashSet<ItemLocalId>;
pub fn NodeMap<T>() -> NodeMap<T> { FxHashMap() }
pub fn DefIdMap<T>() -> DefIdMap<T> { FxHashMap() }
pub fn ItemLocalMap<T>() -> ItemLocalMap<T> { FxHashMap() }
pub fn NodeSet() -> NodeSet { FxHashSet() }
pub fn DefIdSet() -> DefIdSet { FxHashSet() }
+pub fn ItemLocalSet() -> ItemLocalSet { FxHashSet() }