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

one use

	github.com/gotd/td/tg (current package)
		tl_wall_paper_slices_gen.go#L325: func (s WallPaperNoFileArray) Retain(keep func(x WallPaperNoFile) bool) WallPaperNoFileArray {