如何用连接A-> A

Question

我需要在laravel项目中绘制一个sankey-diagram。 数据由一些行组成，在这些行的节点之间和节点之间是相同的。 下面给出示例数据。

  var data = [
      {from: "A",  to: "A", weight: 12},
      {from: "A",  to: "X",  weight: 10},
      {from: "A",  to: "Y", weight: 15},
      {from: "A",  to: "Z",   weight: 20},
      {from: "B",  to: "X",  weight:  15},
      {from: "B",  to: "Y", weight: 5},
      {from: "B",  to: "Z", weight: 8}        
    ]; 

尝试过Google图表，但没有成功。 他们还在文档中提到

注意：避免数据循环：如果A链接到自身，或链接到B 哪个链接到C哪个链接到A，您的图表将不会呈现。

那么如何在数据中绘制带有循环的sankey图表？（A-> A，B-> B ...）