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     invalidate() --> self

        TBrowse:invalidate() causes the next stabilization of the TBrowse
        object to redraw the entire TBrowse display, including headings,
        footings, and all data rows.  Note that sending this message has no
        effect on the values in the data rows:  it simply forces the display
        to be updated during the next stabilization.  To force the data to be
        refreshed from the underlying data source, send the
        TBrowse:refreshAll() message.