page/page.go
func (p PrintToPDFParams) WithMarginLeft(marginLeft float64) *PrintToPDFParams {
	p.MarginLeft = marginLeft
	return &p
}
func (p PrintToPDFParams) WithMarginLeft(marginLeft float64) *PrintToPDFParams {
	p.MarginLeft = marginLeft
	return &p
}
// WithMarginLeft left margin in inches. Defaults to 1cm (~0.4 inches).