input/input.go
func (p SynthesizeScrollGestureParams) WithSpeed(speed int64) *SynthesizeScrollGestureParams {
	p.Speed = speed
	return &p
}
func (p SynthesizeScrollGestureParams) WithSpeed(speed int64) *SynthesizeScrollGestureParams {
	p.Speed = speed
	return &p
}
// WithSpeed swipe speed in pixels per second (default: 800).