MultiViewElement's switching programmatically

Hi all,

I need to change in a TopComponent with some MultiViewElements from
MultiViewA to MultiViewB programmatically.

I try getting first the active TopComponent to obtain after the
MultiViewHandler.

The MultiViewhandler has the method getSelectedPerspective, but not
setSelectedPerspective.

How can I make this? Is this the correct way to do it?

Thanks in advance.