docs: function(node) {
          node.style.visibility = "visible";
          var fillColor = node._style.fillColor;
          var strokeColor = node._style.strokeColor;
          if (fillColor == "none" &&
                  node.fillcolor != fillColor) {
              node.fillcolor = fillColor;
          }
          if (strokeColor == "none" &&
                  node.strokecolor != strokeColor) {
              node.strokecolor = strokeColor;
          }
      }