Title set visible?

[devent]

Hello,
I want to show/hide the title of the graph. Why is the code not working:

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chart.getTitle().setVisible(showTitle);

I.e. the code does not hide the title if a title was present.

If I do

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chart.setTitle("");

the old title is hidden. But if I do

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chart.setTitle(oldTitle);

the old title is not shown.

As I see there is no way to show/hide the title of a graph without to re-create the whole JFreeChart?

Regards, Erwin.