input/input.go
func (p SynthesizeScrollGestureParams) WithXOverscroll(xOverscroll float64) *SynthesizeScrollGestureParams {
	p.XOverscroll = xOverscroll
	return &p
}
func (p SynthesizeScrollGestureParams) WithXOverscroll(xOverscroll float64) *SynthesizeScrollGestureParams {
	p.XOverscroll = xOverscroll
	return &p
}
// WithXOverscroll the number of additional pixels to scroll back along the X
// axis, in addition to the given distance.