*/
    public void addLinearRepresentation(SIRStream key, LinearFilterRepresentation rep) {	checkRep();	if ((key == null) || (rep == null)) {	    throw new IllegalArgumentException("null in add linear rep");	}	if (this.streamsToLinearRepresentation.containsKey(key)) {	    throw new IllegalArgumentException("tried to add key mapping.");	}	if (this.streamsToLinearRepresentation.containsValue(rep)) {	    throw new IllegalArgumentException("tried to add rep second time.");	}	this.streamsToLinearRepresentation.put(key,rep);	checkRep();    }