* Make actionSets field final. * Simplify and fix strange hashCode() impl which based its   generated code on Object#hashCode() first. * Simplify equals(). * Use EnumMap/EnumSet where appropriate. * Add some class documentation.
* Make actionSets field final.
* Simplify and fix strange hashCode() impl which based its
  generated code on Object#hashCode() first.
* Simplify equals().
* Use EnumMap/EnumSet where appropriate.
* Add some class documentation.

[CLEANUP]


vtkio/vtk,vtkio/vtk,vtkio/vtk,vtkio/vtk,vtkio/vtk,vtkio/vtk,vtkio/vtk,vtkio/vtk