public void printElement(){
		System.out.print("CLASS " + identifier + "        ATTRIBUTES ");
		//print attribute
		Iterator<Attribut> it = this.attribut.iterator();
		while (it.hasNext()) {
			Attribut att = it.next();
			System.out.print(att.getIdentifier() + " : " + att.getType() + ", ");
		}
		//print operation
		System.out.print("            OPERATION ");
		for(Operation op : this.operation) {
			System.out.print(op.getIdentifier());
			op.printArg();
			System.out.println(" : " + op.getType() + ", ");
		}
		System.out.println();
	}