github.com/gotd/td/tg.WebPageAttributeThemeArray.Retain (method)

one use

	github.com/gotd/td/tg (current package)
		tl_web_page_attribute_slices_gen.go#L165: func (s WebPageAttributeThemeArray) Retain(keep func(x WebPageAttributeTheme) bool) WebPageAttributeThemeArray {