diff --git a/src/lib/call-queue.hpp b/src/lib/call-queue.hpp
index 5c418041d..cfb138567 100644
--- a/src/lib/call-queue.hpp
+++ b/src/lib/call-queue.hpp
@@ -40,9 +40,11 @@
 #include "lib/error.hpp"
 
 #include <boost/noncopyable.hpp>
+#include <functional>
 
 
 namespace lib {
+  namespace error = lumiera::error;
   
   
   
@@ -54,6 +56,48 @@ namespace lib {
   struct CallQueue
     : boost::noncopyable
     {
+    public:
+      CallQueue() { }
+      
+      using Operation = std::function<void(void)>;
+      
+      CallQueue&
+      feed (Operation&& op)
+        {
+          if (not op)
+            throw error::Logic( "Unbound Functor fed to dispatcher CallQueue"
+                              , error::LUMIERA_ERROR_BOTTOM_VALUE);
+          
+//        lib::IterQueue<Command>::feed (move(cmd));
+          return *this;
+        }
+      
+      void
+      invoke()
+        {
+          UNIMPLEMENTED ("pop operation");
+        }
+      
+      void
+      clear()
+        {
+//        this->stateCore().clear();
+        }
+      
+      
+      /* == diagnostics == */
+      
+      size_t
+      size()  const
+        {
+//        return unConst(this)->stateCore().size();
+        }
+      
+      bool
+      empty() const
+        {
+          return 0 == size();
+        }
       
     };
   
diff --git a/src/proc/control/command-queue.hpp b/src/proc/control/command-queue.hpp
index a74fbe266..cc82b1c69 100644
--- a/src/proc/control/command-queue.hpp
+++ b/src/proc/control/command-queue.hpp
@@ -67,8 +67,7 @@ namespace control {
     {
       
     public:
-      CommandQueue()
-      { }
+      CommandQueue() { }
       
       
       CommandQueue&
@@ -79,7 +78,7 @@ namespace control {
                                    % cmd.getID() % cmd
                               , LUMIERA_ERROR_UNBOUND_ARGUMENTS);
           
-          lib::IterQueue<Command>::feed (move (cmd));
+          lib::IterQueue<Command>::feed (move(cmd));
           return *this;
         }
       
@@ -103,7 +102,6 @@ namespace control {
         {
           return 0 == size();
         }
-      
     };
   
   
diff --git a/tests/library/call-queue-test.cpp b/tests/library/call-queue-test.cpp
index fa99bd392..cc0b73cf7 100644
--- a/tests/library/call-queue-test.cpp
+++ b/tests/library/call-queue-test.cpp
@@ -40,7 +40,7 @@
 namespace lib {
 namespace test{
   
-  using util::cStr;
+  using util::isnil;
   using std::bind;
   using std::string;
   
@@ -77,7 +77,20 @@ namespace test{
       void
       verify_SimpleUse ()
         {
-          UNIMPLEMENTED("verify_SimpleUse");
+          CallQueue queue;
+          CHECK (isnil (queue));
+          
+          int val = 2;
+          queue.feed ([&]() { val = -1; });
+          CHECK (1 == queue.size());
+          CHECK (val == 2);
+          
+          queue.invoke();
+          CHECK (val == -1);
+          CHECK (0 == queue.size());
+          
+          queue.invoke();
+          CHECK (0 == queue.size());
         }
       
       
diff --git a/wiki/thinkPad.ichthyo.mm b/wiki/thinkPad.ichthyo.mm
index 69d337537..2c1fd309a 100644
--- a/wiki/thinkPad.ichthyo.mm
+++ b/wiki/thinkPad.ichthyo.mm
@@ -1047,7 +1047,12 @@
 </node>
 <node CREATED="1501939193031" HGAP="3" ID="ID_1045913810" MODIFIED="1501939200829" TEXT="Test" VSHIFT="20">
 <icon BUILTIN="pencil"/>
-<node CREATED="1501939204166" ID="ID_383444966" MODIFIED="1501939211537" TEXT="CallQueue_test"/>
+<node CREATED="1501939204166" ID="ID_383444966" MODIFIED="1501946866881" TEXT="CallQueue_test">
+<icon BUILTIN="pencil"/>
+<node CREATED="1501946847700" ID="ID_1917302142" MODIFIED="1501946851847" TEXT="basic"/>
+<node CREATED="1501946852555" ID="ID_1617455971" MODIFIED="1501946855975" TEXT="mehrere"/>
+<node CREATED="1501946856587" ID="ID_1780067399" MODIFIED="1501946862958" TEXT="Stre&#xdf;"/>
+</node>
 <node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1501939212693" ID="ID_1007296291" MODIFIED="1501940740143" TEXT="#1099 DemoGuiRoundtrip">
 <linktarget COLOR="#e5e53f" DESTINATION="ID_1007296291" ENDARROW="Default" ENDINCLINATION="-767;134;" ID="Arrow_ID_1440938291" SOURCE="ID_1925240675" STARTARROW="None" STARTINCLINATION="-51;592;"/>
 <icon BUILTIN="flag-yellow"/>