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

one use

	github.com/gotd/td/tg (current package)
		tl_update_slices_gen.go#L3568: func (s UpdateChannelTooLongArray) Retain(keep func(x UpdateChannelTooLong) bool) UpdateChannelTooLongArray {