flowgraph Model for a graph with in and outports. It is mainly for being used as a model for flowgraph-editor. Example var FlowGraph = require('flowgraph') // define your graphgraph = new FlowGraph()graph.addNode('A', ['in'], ['out'])graph.addNode('B') // default ports are in and outgraph.addNode('C', ['1', '2', '3'], ['stdout', 'stderr'])graph.connect('B', 'C', 'out', '2')