code: public boolean couldMatchAtomType(IAtomContainer container, IAtom atom, IAtomType type) {
          double bondOrderSum = container.getBondOrderSum(atom);
          IBond.Order maxBondOrder = container.getMaximumBondOrder(atom);
          return couldMatchAtomType(atom, bondOrderSum, maxBondOrder, type);
      }
docs: Determines if the atom can be of type AtomType.