diff --git a/source/hunt/collection/AbstractDeque.d b/source/hunt/collection/AbstractDeque.d
index c24093e..76fbef8 100644
--- a/source/hunt/collection/AbstractDeque.d
+++ b/source/hunt/collection/AbstractDeque.d
@@ -277,6 +277,10 @@ abstract class AbstractDeque(E) : AbstractQueue!(E), Deque!(E) {
         throw new NotSupportedException();
     }
 
+    override int opApply(scope int delegate(ref E) dg) {
+        throw new NotImplementedException();
+    }    
+
     override bool opEquals(IObject o) {
         return opEquals(cast(Object) o);
     }
diff --git a/source/hunt/collection/AbstractQueue.d b/source/hunt/collection/AbstractQueue.d
index 227d7ea..356dfcc 100644
--- a/source/hunt/collection/AbstractQueue.d
+++ b/source/hunt/collection/AbstractQueue.d
@@ -175,6 +175,11 @@ abstract class AbstractQueue(E) : AbstractCollection!(E), Queue!(E) {
         return modified;
     }
 
+    override int opApply(scope int delegate(ref E) dg) {
+        throw new NotImplementedException();
+        // return 0;
+    }
+
     override bool opEquals(IObject o) {
         return opEquals(cast(Object) o);
     }
diff --git a/source/hunt/collection/AbstractSet.d b/source/hunt/collection/AbstractSet.d
index f616eef..7c35325 100644
--- a/source/hunt/collection/AbstractSet.d
+++ b/source/hunt/collection/AbstractSet.d
@@ -55,6 +55,12 @@ abstract class AbstractSet(E) : AbstractCollection!E, Set!E {
     protected this() {
     }
 
+
+    override int opApply(scope int delegate(ref E) dg) {
+        throw new NotImplementedException();
+        // return 0;
+    }
+
     // Comparison and hashing
 
     /**