namespace OpenMM {
class NonbondedForce : public Force {
public:
    enum NonbondedMethod {
        NoCutoff = 0,
        CutoffNonPeriodic = 1,
        CutoffPeriodic = 2
    };
    void setNonbondedMethod(NonbondedMethod method);
    void setCutoffDistance(double distance);
    int addParticle(double charge, double radius, double depth);
    int addException(int particle1, int particle2,
                     double chargeProd, double sigma, double epsilon);
protected:
private:
};
} // namespace OpenMM