page/page.go
func (p PrintToPDFParams) WithLandscape(landscape bool) *PrintToPDFParams {
	p.Landscape = landscape
	return &p
}
func (p PrintToPDFParams) WithLandscape(landscape bool) *PrintToPDFParams {
	p.Landscape = landscape
	return &p
}
// WithLandscape paper orientation. Defaults to false.