private void createDefaultExtractOperation(){
		this.currentStreamOperation = new DStreamOperation(this.operationIdCounter++);
		this.currentStreamOperation.addStreamOperationFunction(Ops.extract.name(), s -> s);
	}
private void createDefaultExtractOperation ( ) { this . currentStreamOperation = new DStreamOperation ( this . operationIdCounter ++ ) ; this . currentStreamOperation . addStreamOperationFunction ( Ops . extract . name ( ) , s -> s ) ; }
Will create an operation named 'extract' with a pass-thru function