.nrSplines          self.bMesh = bmesh.new()          self.splineSurfaces = self.SetupSplineSurfaces()          self.Apply()       def SetupSplineSurfaces(self):         rvSplineSurfaces = []          currV0Index = 0         for i in range(self.nrSplines):             splineRail0 = self.rail0Curve.splines[i]             splineRail0 = self.rail0Curve.splines[i]             spline