How to use cell type arrays in Simulink MATLAB function block

I am trying to create an array of arrays (cells I suppose) of constants so I can iterate over the constants and not create a separate loop/function call for each set of arrays. My structure is as follows:

CONSTANTS = {
              {
                { 100, 10, 1}, 
                { 200, 20, 2},
                { 300, 30, 3}
              },
              {
                { 110, 10, 1},
                { 210, 20, 2},
                { 310, 30, 3}
              }
            };

and I am trying to attempt a loop similar to the following:

for i=1:length(CONSTANTS)
    for j=1:length(CONSTANTS{i})
        f = doSomething(CONSTANTS{i}{j}(1),CONSTANTS{i}{j}(2),CONSTANTS{i}{j}(3));
    end
end

Is this possible in a Simulink MATLAB block even though Simulink can't use a "cell" type? Can I create an array of a user defined class?