   end
 
   def put(pid, key, value) do
-    ServerProcess.call(pid, {:put, key, value})
+    ServerProcess.cast(pid, {:put, key, value})
   end
 
   def get(pid, key) do

          )

        send(caller, {:response, response})

        loop(callback_module, new_state)
    end

    %{}
  end

  def handle_cast({:put, key, value}, state) do
    Map.put(state, key, value)
  end

  def handle_call({:get, key}, state) do
