         is_docked = false 
       else
         dimensions =  if fetch(v.key).docked
-                        docker.component_history[v.key].on_dock
+                        dockingStation.component_history[v.key].on_dock
                       else 
                         {height: v.height, jut_above: v.jut_above}
 
-        is_docked = docker.viewport.top + y_stack + dimensions.jut_above >= v.start
+        is_docked = dockingStation.viewport.top + y_stack + dimensions.jut_above >= v.start
 
       if is_docked
         y_stack += dimensions.height


  componentDidMount : -> 

    # Register this dock with docker. Send docker a callback that it 
    # can invoke to learn about this dock when making calculations. 

    $el = $(@refs.dock_child.getDOMNode()).children()

    for v, i in sorted
      console.log "**#{v.key} constraints**" if debug
      k = v.key; dock = fetch k
      previous_calculated_y = dockingStation.component_history[k].previous.calculated_y

      # START
      console.log "\tSTART: #{k} >= #{v.start}, strong" if debug
