public void addVariablesWithLambdaProductions(Grammar grammar, Set lambdaSet) {
		while (areMoreVariablesWithLambdaProductions(grammar, lambdaSet)) {
			String variable = getNewVariableWithLambdaProduction(grammar,
					lambdaSet);
			addVariableToLambdaSet(variable, lambdaSet);
		}
	}