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

one use

	github.com/gotd/td/tg (current package)
		tl_update_slices_gen.go#L5974: func (s UpdateChannelAvailableMessagesArray) Retain(keep func(x UpdateChannelAvailableMessages) bool) UpdateChannelAvailableMessagesArray {