Is there a way to replace containers.Map with something that passes the Matlab Coder?

I'm trying to convert this model to C: https://www.mathworks.com/matlabcentral/fileexchange/47685-contour-detection-with-the-push-pull-corf-model

I've already fixed most of the discrepancies, but just figured out that the code heavily uses containers.Map. Is there a way that I could swap that with another object of similar functionality? Maybe a raw implementation that the Matlab Coder eats without a problem?

The map hashmap it uses does not take that much of elements (~16), so it doesn't matter if the lookup is linear.