public ReturnsDouble(SWIGTYPE_p_f_int_double__double arg0) : this(native_wrapPINVOKE.new_ReturnsDouble__SWIG_1(SWIGTYPE_p_f_int_double__double.getCPtr(arg0)), true)
 {
 }
 internal static global::System.Runtime.InteropServices.HandleRef getCPtr(SWIGTYPE_p_f_int_double__double obj)
 {
     return((obj == null) ? new global::System.Runtime.InteropServices.HandleRef(null, global::System.IntPtr.Zero) : obj.swigCPtr);
 }