onToolRemoved  
  fun onToolRemoved(connectFlags: <Error class: unknown class> = ConnectFlags(0u), handler: (tool: DeviceTool) -> Unit): <Error class: unknown class>(source)
Emitted whenever a tool is no longer known to this @seat.
Parameters
connectFlags 
a combination of ConnectFlags
handler
the Callback to connect. Params: tool the just removed GdkDeviceTool