grouping shocks in decompositions

would it be possible to allow a more flexible naming of the groups, allowing a sort of verbatim reading of what is before = . the following syntax does not work

shock_groups;
...
Price Mark-up EA = emup;
Wage Mark-up EA = emuw;
...
end;

not sure if this can be modified, by allowing group names to be given inside brackets, as follows:

shock_groups;
...
(Price Mark-up EA) = emup;
(Wage Mark-up EA) = emuw;
...
end;

?