code: def get_hist(self, observable: Any, **kwargs: Dict[str, Any]) -> Any:
          
          return observable
docs: Get the histogram that may be stored in some object.
  
          This histogram is used to project from.
  
          Note:
              The output object could just be the raw ROOT histogram.
  
          Note:
              This function is just a basic placeholder and likely should be overridden.
  
          Args:
              observable (object): The input object. It could be a histogram or something more complex
              kwargs: Additional arguments passed to the projection function
          Return:
              ROOT.TH1 or ROOT.THnBase histogram which should be projected. By default, it returns the
                  observable (input object).