code: def fcor(self):
          '''
          The CBV-corrected de-trended flux.
  
          '''
  
          if self.XCBV is None:
              return None
          else:
              return self.flux - self._mission.FitCBVs(selff fcor(self):
          '''
          The CBV-corrected de-trended flux.
  
          '''
  
          if self.XCBV is None:
              return None
          else:
              return self.flux - self._mission.FitCBVs(self)
docs: The CBV-corrected de-trended flux.