use rustc::hir::itemlikevisit::ItemLikeVisitor;
use rustc::ty::query::Providers;
use rustc::ty::TyCtxt;
+use rustc_span::symbol::sym;
+use rustc_span::Span;
use syntax::attr;
-use syntax::symbol::sym;
-use syntax_pos::Span;
struct RegistrarFinder {
registrars: Vec<(hir::HirId, Span)>,