How to define rrMap in rodrunnerHDMap as multiple rather than just one

I define and use roadrunnerHDMap as rrMap in a single MATLAB script. I want to divide the function called roadrunnerHDMap into several and set up a lane and a lane boundary in each map. Is it possible?

If possible, what are the options?

- example code -

rrMap_1 = roadrunnerHDMap;

rrMap_2 = roadrunnerHDMap;

I defined it as a variable with a different name like the code above, but the results show that both geometry and lane settings are applied the same