Source code for recent versions

It seems that the source code for `com.microsoft.azure.azure-documentdb` used to be available, specifically for [1.8.0](https://github.com/Azure/azure-documentdb-java/tree/1.8.0) and earlier. Recently however, 2.4.1 has been [released](https://mvnrepository.com/artifact/com.microsoft.azure/azure-documentdb), but the source doesn't seem to be here. Am I just looking at the wrong place or did you stop doing open source?