[Cbc] Possible to get information about eliminated variables from CglPreProcess

[fpeng]

Hello Cbc community,

Is there an easy way to extract information about variables that are 
eliminated from preprocessing? Say I do something like:

CglPreProcess process;
OsiSolverInterface * solver2 = process.preProcess(*solver_, false, 8);

at this point the variables in solver2 may be different from what were 
in solver_ because CglPreProcess did some smart things to determine that 
certain variables are not needed. However, some of these eliminated 
variables may be set to 0 or 1 (e.g. for a binary variable), and if I 
have a custom cbcHeuristic that relies on the original set of variables 
in solve_, I want to know which variables are eliminated, and what they 
are set to. I can figure out what variables are eliminated with 
originalColumns(), but I don't see an easy way to do the latter?

Thanks!
Fei