How I would format the "command" example for scopt

example.scala

cmd("update").
  action { (_, c) => c.copy(mode = "update") }.
  text("update is a command.").
  children(
    opt[Unit]("not-keepalive").
      abbr("nk").
      action { (_, c) => c.copy(keepalive = false) }.
      text("disable keepalive"),
    opt[Boolean]("xyz").
      action { (x, c) => c.copy(xyz = x) }.
      text("xyz is a boolean property"),
    checkConfig { c =>
      if (c.keepalive && c.xyz) failure("xyz cannot keep alive") 
      else success 
    }
  )