sendMessage
abstract suspend fun sendMessage( serviceConnectionId: ServiceConnectionId, serviceUuid: ServiceUuid, data: ByteArray): Boolean
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Sends a message with the specified data to the connection with the specified serviceConnectionId for the service with the specified serviceUuid. Returns true when the message is successfully send, false when close was already called or there was no connection at the time.
Note: The serviceConnectionId should be retrieved from a call to the services ConnectivityClientServiceListener.onServiceConnected. If the connection was dropped in the mean time this method will return false.