How to reset VisualShape's parameters

[fishbotics]

Hi,

I am visualizing an environment where a robot is navigating around several floating balls. I have been using createVisualShape to create the balls and then attaching them to the environment with createMultiBody. It seems that I have to create the visual shape with the radius up front, but I am creating many examples with different configurations of spheres (in terms of radius and location). Is there any way to change the radius of a visual shape after creating it? Right now, I just create a new one for each trial, but then the simulator eventually crashes (I assume due to too many visual shapes).