code: def guard_unassign(duplicate_analysis):
      
      analysis = duplicate_analysis.getAnalysis()
      if wf.isTransitionAllowed(analysis, "unassign"):
          return True
      skip = ["retracted", "rejected", "unassigned"]
      if api.get_review_status(analysis) in skip:
          return True
      return analysis_guards.guard_unassign(duplicate_analysis)
docs: Return whether the transition 'unassign' can be performed or not