lint_callback!(cx, check_impl_item, impl_item);
hir_visit::walk_impl_item(cx, impl_item);
lint_callback!(cx, check_impl_item_post, impl_item);
lint_callback!(cx, check_impl_item, impl_item);
hir_visit::walk_impl_item(cx, impl_item);
lint_callback!(cx, check_impl_item_post, impl_item);