code: function(id) {
      if(this.hasNode(id)) {
        delete this.nodes[id];
        var adjs = this.edges[id];
        for(var to in adjs) {
          delete this.edges[to][id];
        }
        delete this.edges[id];
      }
    }
docs: /*
  Method: removeNode
  
  Removes a <Graph.Node> matching the specified *id*.
  
  Parameters:
  
  id - (string) A node's id.