new RuntimeException("not implemented yet").printStackTrace(); return -1;
SIRJoiner joiner = obj.getJoiner(); if (joiner.getType()==SIRJoinType.NULL) { return 0; } else { return joiner.getSumOfWeights(); }
    public int getJoinPush (int nWork) {	new RuntimeException("not implemented yet").printStackTrace();	return -1;    }