Blurb::
Tracks the best fitness of the population
Description::
The \c best_fitness_tracker tracks the best fitness in the
population. Convergence occurs after \c num_generations has passed and
there has been less than \c percent_change in the best fitness
value. The percent change can be as low as 0% in which case there must
be no change at all over the number of generations.


Topics::
Examples::
Theory::
Faq::
See_Also::	method-soga-convergence_type-average_fitness_tracker 
