public void set_volu_fractions(DoubleVector volu_fractions)
 {
     if (Environment.Is64BitProcess)
     {
         CoolPropPINVOKE64.AbstractState_set_volu_fractions(swigCPtr, DoubleVector.getCPtr(volu_fractions));
         //if (CoolPropPINVOKE.SWIGPendingException.Pending) throw CoolPropPINVOKE.SWIGPendingException.Retrieve();
     }
     else
     {
         CoolPropPINVOKE.AbstractState_set_volu_fractions(swigCPtr, DoubleVector.getCPtr(volu_fractions));
         //if (CoolPropPINVOKE.SWIGPendingException.Pending) throw CoolPropPINVOKE.SWIGPendingException.Retrieve();
     }
 }