-use rustc::hir;
-use rustc::hir::itemlikevisit::ItemLikeVisitor;
use rustc::ty::TyCtxt;
+use rustc_hir as hir;
+use rustc_hir::itemlikevisit::ItemLikeVisitor;
+use rustc_span::symbol::sym;
use rustc_target::spec::abi::Abi;
-use syntax::symbol::sym;
crate fn collect(tcx: TyCtxt<'_>) -> Vec<String> {
let mut collector = Collector { args: Vec::new() };