def METHOD_NAME():
    PB = vtk.vtkParametricBoy()
    PFS = vtk.vtkParametricFunctionSource()
    PFS.SetParametricFunction(PB)
    PFS.SetUResolution(400)
    PFS.SetVResolution(500)
    PFS.Update()
    appendFilter = vtk.vtkAppendFilter()
    appendFilter.AddInputData(PFS.GetOutput())
    appendFilter.Update()
    result = vtk.vtkUnstructuredGrid()
    result.ShallowCopy(appendFilter.GetOutput())
    return result