code: func NewGraph(title string) *Panel {
  	if title == "" {
  		title = "Panel Title"
  	}
  	render := "flot"
  	return &Panel{
  		commonPanel: commonPanel{
  			OfType:   GraphType,
  			Title:    title,
  			Type:     "graph",
  			Renderer: &render,
  			Span:     12,
  			IsNew:    true},
  		GraphPanel: &GraphPanel{
  			NullPointMode: "connected",
  			Pointradius:   5,
  			XAxis:         true,
  			YAxis:         true,
  		}}
  }
docs: // NewGraph initializes panel with a graph panel.