use crate::ty::TyCtxt;
+use rustc_ast::ast::NodeId;
use rustc_hir::def_id::DefId;
use rustc_hir::BodyId;
-use syntax::ast::NodeId;
/// The `DepGraphSafe` trait is used to specify what kinds of values
/// are safe to "leak" into a task. The idea is that this should be