bool OEBondIsInAromaticRingSize(const OEBondBase &bnd, unsigned int size)
Determine whether the given bond is in an aromatic cycle of the
specified size. The function OEFindRingAtomsAndBonds
should have
been called before calling this function. If the bond is not aromatic,
i.e. OEBondBase::IsAromatic
returns false, then this function
also returns false.