     @nodes_map = {}
     for d in data.converters
       i = new Node(d)
+      continue if i.bad_node()
       @nodes.push i
       @nodes_map[i.key] = i
 

    @x = attrs.x
    @y = attrs.y
    @key = attrs.key

class Link
  constructor: (left, right) ->

        classes: "ui-tooltip-tipsy"

  rescale: =>
    trans = d3.event.translate
    scale = d3.event.scale
    @svg.attr("transform", "translate(#{trans}) scale(#{scale})")
