Jupyter Lab的R键盘快捷键

Question

如何在jupyter实验室为R用户创建自定义键盘快捷键？例如R分配，R管道？以下解决方案无效。

"R_assign": {
  "command": "type",
  "args": [
      " <- "
  ],
  "keys": [
    "Alt -"
  ]
},

"R_pipe": {
  "command": "type",
  "args": [
      " %>% "
  ],
  "keys": [
    "Ctrl Shift M"
  ]
}