page/page.go
func (p PrintToPDFParams) WithFooterTemplate(footerTemplate string) *PrintToPDFParams {
	p.FooterTemplate = footerTemplate
	return &p
}
func (p PrintToPDFParams) WithFooterTemplate(footerTemplate string) *PrintToPDFParams {
	p.FooterTemplate = footerTemplate
	return &p
}
// WithFooterTemplate HTML template for the print footer. Should use the same
// format as the headerTemplate.