def METHOD_NAME(self, deconstructedDict):
    """
  Converts the formatted dictionary -> {'MASS|U235':1.30, MASS|PU241':4.69}.
  into a dictionary of dictionaries that has the format -> {'MASS':{'U235':1.30, 'PU241':4.69}}
  @ In, deconstructedDict, dictionary, dictionary of perturbed variables
  @ Out, reconstructedDict, dictionary, nested dictionary of perturbed variables