docs: def plot(self):
          """ Graphical summary of pointwise pareto-k importance-sampling indices
  
          Pareto-k tail indices are plotted (on the y axis) for each observation unit (on the x axis)
  
          """
          seaborn.pointplot(
              y = self.pointwise.pareto_k,
              x = self.pointwise.index,
              join = False)