docs: def _get_xlabel(self):
          """
          Determines the xlabel based on the underlying data structure
          """
          # Return user-specified label
          if self.xlabel:
              return self.xlabel
  
          # Label for coefficients
          if hasattr(self.estimator, "coef_"):
              if self.relative:
                  return "relative coefficient magnitude"
              return "coefficient value"
  
          # Default label for feature_importances_
          if self.relative:
              return "relative importance"
          return "feature importance"