anchor: Joystick:isGamepad
  Gets whether the Joystick is recognized as a gamepad. If this is the case, the Joystick's buttons and axes can be used in a standardized manner across different operating systems and joystick models via Joystick:getGamepadAxis, Joystick:isGamepadDown, love.gamepadpressed, and related functions.
  
  LÖVE automatically recognizes most popular controllers with a similar layout to the Xbox 360 controller as gamepads, but you can add more with love.joystick.setGamepadMapping.
  isgamepad = Joystick:isGamepad()
  isgamepad boolean True if the Joystick is recognized as a gamepad, false otherwise.