code: def getInterval(self, alpha):
          
          dlnl = twosided_cl_to_dlnl(1.0 - alpha)
          lo_lim = self.getDeltaLogLike(dlnl, upper=False)
          hi_lim = self.getDeltaLogLike(dlnl, upper=True)
          return (lo_lim, hi_lim)
docs: Evaluate the interval corresponding to a C.L. of (1-alpha)%.
  
          Parameters
          ----------
          alpha : limit confidence level.