virtual unsigned int GetDegree() const
Return the total number of neighbor atoms bonded to an atom, or
equivalently the total number of bonds connected to an atom. This
value includes bonds to implicit hydrogen atoms. This value is
identical to
OEAtomBase::GetExplicitDegree() + OEAtomBase::GetImplicitHCount()
,
and is also identical to
OEAtomBase::GetHvyDegree() + OEAtomBase::GetTotalHCount()
.