Use at deprecate

YingboMa · ChrisRackauckas · web-flow · commit d2028ec10a00 · 2020-09-02T11:14:37.000-05:00
Co-authored-by: Christopher Rackauckas &lt;accounts@chrisrackauckas.com&gt;
diff --git a/src/DataStructures.jl b/src/DataStructures.jl
@@ -112,5 +112,5 @@ module DataStructures
     include("splay_tree.jl")
 
     include("deprecations.jl")
-    const top = first
+    @deprecate top(h::BinaryHeap) = first(h)
 end
