onReleased 
  fun onReleased(connectFlags: <Error class: unknown class> = ConnectFlags(0u), handler: (<Error class: unknown class>, <Error class: unknown class>, <Error class: unknown class>) -> Unit): <Error class: unknown class>(source)
Emitted when a button or touch is released.
Parameters
connectFlags 
a combination of ConnectFlags
handler
the Callback to connect. Params: nPress number of press that is paired with this release; x The X coordinate, in widget allocation coordinates; y The Y coordinate, in widget allocation coordinates