Calling constructor of custom global planner

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Hi

I have created a custom global planner based on Genetic Algorithm.

I followed this tutorial:

http://wiki.ros.org/navigation/Tutori...

In the constructor:

GeneticAlgorithmGlobalPlanner(std::string name, costmap_2d::Costmap2DROS* costmap_ros,

int numberOfIterations, int populationSize, int crossType, float crossProbability, float mutationProbability, int raduis);

The parameters in bold are specific to GA and used in any implementation for GA

My question is:

When I use the planner:

<param name="base_global_planner" value="ga_global_planner/GeneticAlgorithmGlobalPlanner"/>

How can I pass these parameters?