100644 blob d91697d0d6da1300216c1ed7706ddf800af252be	JoinCustomGrouping.java
100644 blob 560b5942f9d0747dd9406d7dff00047b4fa9d0dc	ReduceByKeyAndWindowCustomGrouping.java
100644 blob b5bc8234577c477a17fc12cc5bea72e80dbe9ad6	RemapCustomGrouping.java