public myPortion[] fusion(myPortion last, myPortion inserted){
        myPortion[] result;
        if(last.getEnd()<inserted.getBegin()){
            result= new myPortion[2];
            result[0]=last;
            result[1]=inserted;
        }
        else {
            myPortion fus = new myPortion(last.getBegin(), Math.max(last.getEnd(), inserted.getEnd()));
            result = new myPortion[1];
            result[0] = fus;
        }
        return result;
    }