github.com/gotd/td/tg.PhoneGroupCallStreamRtmpURL.GetKey (method, view implemented interface methods)

one use

	github.com/gotd/td/tg (current package)
		tl_phone_group_call_stream_rtmp_url_gen.go#L184: func (g *PhoneGroupCallStreamRtmpURL) GetKey() (value string) {