MATLAB: Save() and load() Variables in Object of correct Class

Question

map = containers.Map();
map('key') = 'value';
strg = 'string';
whos
save('workspace6.mat', 'map', 'strg', '-v7.3');
whos -file workspace6.mat
map2 = load('workspace6.mat', 'map');
strg2 = load('workspace6.mat', 'strg');
whos

gives:

Name      Size            Bytes  Class             Attributes
map       1x1                 8  containers.Map              
strg      1x6                12  char                        
Name      Size            Bytes  Class             Attributes
map        -                  8  containers.Map              
strg      1x6                12  char                        
Name       Size            Bytes  Class             Attributes
map        1x1                 8  containers.Map              
map2       1x1               184  struct                      
strg       1x6                12  char                        
strg2      1x1               188  struct

It seems like it knows what type is in the file. But loaded back into a workspace variable it makes everything a struct. How do I get the data as an object of the correct class (including all sub-objects, if possible)?

I tried with and without '-v7.3' arguemnt.

Answer 1

OK, got it:

ws = load('workspace6.mat');
map2 = ws.map;
strg2 = ws.strg;