我可以在R中的ggraph/ggplot2中分离弧形图中的两组顶点吗？

library(ggraph)
library(ggplot2)

# 创建节点数据
nodes <- data.frame(
  id = c(1:10),
  group = c(rep("Group 1", 5), rep("Group 2", 5))
)

# 创建边数据
edges <- data.frame(
  from = c(1, 2, 3, 4, 5, 6, 7, 8, 9, 10),
  to = c(2, 3, 4, 5, 1, 7, 8, 9, 10, 6)
)

# 创建图对象
graph <- graph_from_data_frame(edges, vertices = nodes)

# 绘制弧形图
ggplot(graph, aes(fill = group)) +
  geom_node_arc_bar(aes(start = node_degree(from) / sum(node_degree(from)),
                       end = node_degree(from) / sum(node_degree(from)) + node_degree(to) / sum(node_degree(from))),
                    width = 0.1) +
  geom_node_point() +
  geom_edge_arc() +
  theme_void()