code: public boolean isShuffle(){
  		if (this.operationNames.size() > 0){
  			String operationName = this.operationNames.get(0);
  			return Ops.isShuffle(operationName);
  		}
  		return false;
  	}
docs: Returns <i>true</i> if this {@link DStreamOperation} represents a <i>shuffle</i>
  operation (see {@link Ops#isShuffle(String)}