Compare the bond table of the two molecules.

        Args:
            mol1: first molecule. pymatgen Molecule object.
            mol2: second moleculs. pymatgen Molecule objec.

def are_equal(self, mol1, mol2):
        """
        Compare the bond table of the two molecules.

        Args:
            mol1: first molecule. pymatgen Molecule object.
            mol2: second moleculs. pymatgen Molecule objec.
        """
        b1 = set(self._get_bonds(mol1))
        b2 = set(self._get_bonds(mol2))
        return b1 == b2