def METHOD_NAME(self):
    atref = np.zeros((100,))
    # converts units to eV (which are set to one in ase)
    atref[1] = self.self_energies["H"]
    atref[6] = self.self_energies["C"]
    atref[7] = self.self_energies["N"]
    atref[8] = self.self_energies["O"]
    return {ANI1.energy: atref.tolist()}