use crate::check::FnCtxt;
use hir::def_id::DefId;
use hir::{Body, HirId, HirIdMap, Node};
-use rustc_data_structures::fx::FxHashMap;
-use rustc_data_structures::stable_set::FxHashSet;
+use rustc_data_structures::fx::{FxHashMap, FxHashSet};
use rustc_hir as hir;
use rustc_index::bit_set::BitSet;
use rustc_index::vec::IndexVec;