Howto override the argument names of certain class member functions

I am wrapping a relatively complex C++ class library to produce a Python 
interface. One thing I haven't worked out how to do is to tell SWIG to 
return certain function reference arguments on the lhs of the function 
call only, ie. assume them to be OUTPUT only references. For example 
(very simplified):

class DataFile {

public:

     Error setInfo(const Info& info);    // Input only reference

     Error getInfo(Info& info);        // Output only reference

};

Now I can rename the getInfo function in the C++ class library to "Error 
getInfo(Info& OUTPUT);" say and add the appropriate typemaps to match 
this and that works, but I really don't want to rename all of the C++'s 
API function arguments for all of the classes in this library (They are 
used for doxygen etc).

This there a simple way in SWIG to override/rename the arguments of a 
particular function and/or particular classes member function ? So 
something like:

%rename("getInfo(Info& OUTPUT)") "getInfo(Info& info)"

%rename("DataFile::getInfo(Info& OUTPUT)") "DataFile::getInfo(Info& info)"



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