code: public CassandraSink<IN> slotSharingGroup(String slotSharingGroup) {
  		if (useDataStreamSink) {
  			getSinkTransformation().setSlotSharingGroup(slotSharingGroup);
  		} else {
  			getStreamTransformation().setSlotSharingGroup(slotSharingGroup);
  		}
  		return this;
  	}
docs: Sets the slot sharing group of this operation. Parallel instances of
  operations that are in the same slot sharing group will be co-located in the same
  TaskManager slot, if possible.
  
  <p>Operations inherit the slot sharing group of input operations if all input operations
  are in the same slot sharing group and no slot sharing group was explicitly specified.
  
  <p>Initially an operation is in the default slot sharing group. An operation can be put into
  the default group explicitly by setting the slot sharing group to {@code "default"}.
  
  @param slotSharingGroup The slot sharing group name.