code: def getGenericInterface(interfaceVersion):
      
      error = EVRInitError()
      result =     _openvr.VR_GetGenericInterface(interfaceVersion, byref(error))
      _checkInitError(error.value)
      return result
docs: Returns the interface of the specified version. This method must be called after VR_Init. The
      pointer returned is valid until VR_Shutdown is called.