def get_maximum_fitness_instance(merged_population):
    """
    small helper function returning the instance of a population with maximum fitness

    """

    max_fit_inst = None
    max_biased_fitness = 0

    for inst in merged_population:
        if max_biased_fitness < inst.fitness:
            max_fit_inst = inst
            max_biased_fitness = inst.fitness
    return max_fit_inst