The LikelihoodModel.h is the base class.
I have mentioned in the LogitPiecewiseBound class

	/** set the variational NORMAL distribution given data and parameters
	 *
	 * @param mu mean of the variational normal distribution
	 * @param s2 variance of the variational normal distribution
	 * @param lab labels/data used
	 *
	 */
	virtual void set_distribution(SGVector<float64_t> mu, SGVector<float64_t> s2, const CLabels* lab);