The OEClearAromaticFlags function is equivalent to the following code.
void MyClearAromaticFlags(OEMolBase &mol) { OEIter<OEAtomBase> atom; for (atom = mol.GetAtoms();atom;++atom) atom->SetAromatic(false); OEIter<OEBondBase> bond; for (bond = mol.GetBonds();bond;++bond) bond->SetAromatic(false); }