VTK/Examples/Broken/ApplyColors

How is this different than just using SetArray with a colors array?

ApplyColors.cxx

#include <vtkSmartPointer.h>
#include <vtkProperty.h>
#include <vtkPointSource.h>
#include <vtkApplyColors.h>
#include <vtkPolyDataMapper.h>
#include <vtkActor.h>
#include <vtkRenderWindow.h>
#include <vtkRenderer.h>
#include <vtkRenderWindowInteractor.h>

int main(int argc, char *argv[])
{
  vtkSmartPointer<vtkPointSource> pointSource = 
      vtkSmartPointer<vtkPointSource>::New();
  pointSource->SetNumberOfPoints(20);
  pointSource->Update();
  
  vtkSmartPointer<vtkApplyColors> applyColors = 
      vtkSmartPointer<vtkApplyColors>::New();
  applyColors->SetInputConnection(pointSource->GetOutputPort());
  applyColors->Update();
  
  //Create a mapper and actor
  vtkSmartPointer<vtkPolyDataMapper> mapper = 
      vtkSmartPointer<vtkPolyDataMapper>::New();
  mapper->SetInputConnection(applyColors->GetOutputPort());
  mapper->SetScalarModeToUseCellFieldData(); 
  mapper->SelectColorArray("vtkApplyColors color"); 
  mapper->SetScalarVisibility(true);
  
  vtkSmartPointer<vtkActor> actor = 
      vtkSmartPointer<vtkActor>::New();
  actor->SetMapper(mapper);
  actor->GetProperty()->SetPointSize(3);
  
    //Create a renderer, render window, and interactor
  vtkSmartPointer<vtkRenderer> renderer = 
      vtkSmartPointer<vtkRenderer>::New();
  vtkSmartPointer<vtkRenderWindow> renderWindow = 
      vtkSmartPointer<vtkRenderWindow>::New();
  renderWindow->AddRenderer(renderer);
  vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = 
      vtkSmartPointer<vtkRenderWindowInteractor>::New();
  renderWindowInteractor->SetRenderWindow(renderWindow);
 
  //Add the actor to the scene
  renderer->AddActor(actor);
  renderer->SetBackground(1,1,1); // Background color white
 
  //Render and interact
  renderWindow->Render();
  renderWindowInteractor->Start();
  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 2.6)
PROJECT(ApplyColors)

FIND_PACKAGE(VTK REQUIRED)
INCLUDE(${VTK_USE_FILE})

ADD_EXECUTABLE(ApplyColors ApplyColors.cxx)
TARGET_LINK_LIBRARIES(ApplyColors vtkHybrid vtkInfovis)