docs: def get_critical_original_kink_ratio(self):
          """
          Returns a list of molar mixing ratio for each kink between ORIGINAL
          (instead of processed) reactant compositions. This is the
          same list as mixing ratio obtained from get_kinks method
          if self.norm = False.
  
          Returns:
              A list of floats representing molar mixing ratios between
              the original reactant compositions for each kink.
          """
          ratios = []
          if self.c1_original == self.c2_original:
              return [0, 1]
          reaction_kink = [k[3] for k in self.get_kinks()]
          for rxt in reaction_kink:
              ratios.append(abs(self._get_original_composition_ratio(rxt)))
          return ratios