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

one use

	github.com/gotd/td/tg (current package)
		tl_secure_plain_data_slices_gen.go#L57: func (s SecurePlainDataClassArray) Retain(keep func(x SecurePlainDataClass) bool) SecurePlainDataClassArray {