old_contents: # export user-relevant objects:
  from pyscipopt.scip import Model
  from pyscipopt.linexpr import quicksum
  from pyscipopt.Multidict import multidict
  from pyscipopt.scip import Pricer
  
new_contents: # export user-relevant objects:
  from pyscipopt.linexpr import quicksum
  from pyscipopt.Multidict import multidict
  from pyscipopt.scip import Model
  from pyscipopt.scip import Pricer
  from pyscipopt.scip import Reader
  from pyscipopt.scip import Conshdlr
  
subject: add Reader and Conshdlr to __init__