page/page.go
func (p *SetFontFamiliesParams) Do(ctx context.Context) (err error) {
	return cdp.Execute(ctx, CommandSetFontFamilies, p, nil)
}
func (p *SetFontFamiliesParams) Do(ctx context.Context) (err error) {
	return cdp.Execute(ctx, CommandSetFontFamilies, p, nil)
}
// Do executes Page.setFontFamilies against the provided context.