如何在d3plus环中仅显示主连接

// 假设已经准备好了连接数据
var connections = [
  { source: "A", target: "B" }, // 主连接
  { source: "B", target: "C" }, // 主连接
  { source: "C", target: "D" }, // 主连接
  { source: "D", target: "E" }, // 主连接
  { source: "E", target: "F" }, // 主连接
  { source: "F", target: "G" }  // 主连接
  { source: "G", target: "H" }  // 其他连接
];

// 创建环图
var visualization = d3plus
  .RingNetwork()
  .data(connections)
  .groupBy(["source", "target"])
  .render();

// 过滤连接数据，只保留主连接
var mainConnections = connections.filter(function(connection) {
  return connection.source === "A" || connection.source === "B" || connection.source === "C" || connection.source === "D" || connection.source === "E" || connection.source === "F";
});

// 更新环图，只显示主连接
visualization.data(mainConnections).render();