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

one use

	github.com/gotd/td/tg (current package)
		tl_input_wall_paper_slices_gen.go#L57: func (s InputWallPaperClassArray) Retain(keep func(x InputWallPaperClass) bool) InputWallPaperClassArray {