old_contents: from .qsim_circuit import *
  from .qsim_simulator import *
  from .qsimh_simulator import *
  
  
  
new_contents: from .qsim_circuit import add_op_to_opstring, add_op_to_circuit, QSimCircuit
  from .qsim_simulator import QSimSimulatorState, QSimSimulatorTrialResult, QSimSimulator
  from .qsimh_simulator import QSimhSimulator
  
subject: Replace star imports to fix mypy issue.