code: function(ctxt, hRatio, vRatio) {
        var containers = this.layer.containers;
        var n = containers.length,i,gIS = WireIt.getIntStyle,containerEl;
        for(i = 0 ; i < n ; i++) {
           containerEl = containers[i].el;
           ctxt.fillRect(gIS(containerEl, "left")*hRatio, gIS(containerEl, "top")*vRatio, 
                         gIS(containerEl, "width")*hRatio, gIS(containerEl, "height")*vRatio);
        }
     }
docs: Subroutine to draw the containers
  @method drawContainers