int GiSTnode::IsOverFull(const GiSTstore &store) const { return Size() > store.PageSize(); }
int MTnode::IsUnderFull(const GiSTstore &store) const { return ((MIN_UTIL>0)&&(Size()<(int)(store.PageSize()*MIN_UTIL))); }
int GiSTnode::IsUnderFull(const GiSTstore &store) const { return Size() < store.PageSize() / 2; }