如何按顺序定位 nz-graph 的节点？

Question

如何使Node a放置在其邻居节点b的级别上？

{
  nodes: [
    {id: `enter`, width: 100, height: 100},
    {id: `a`, width: 100, height: 100},
    {id: `b`, width: 100, height: 100},
    {id: `c`, width: 100, height: 100},
    {id: `exit`, width: 100, height: 100},
  ],
  edges: [
    {v: `enter`, w: `a`},
    {v: `a`, w: `c`},
    {v: `c`, w: `exit`},
    {v: `enter`, w: `b`},
    {v: `b`, w: `exit`},
  ]
}

Answer 1

{
  nodes: [
    {id: `enter`, width: 100, height: 100},
    {id: `a`, width: 100, height: 100},
    {id: `b`, width: 100, height: 100},
    {id: `c`, width: 100, height: 100},
    {id: `exit`, width: 100, height: 100},
  ],
  edges: [
    {v: `enter`, w: `a`},
    {v: `a`, w: `c`},
    {v: `c`, w: `exit`},
    {v: `enter`, w: `c`},
    {v: `b`, w: `exit`},
  ]
}