question: @ Override public void datasetChanged ( DatasetChangeEvent event ) { super . datasetChanged ( event ) ; if ( this . subplots == null ) { return ; } XYDataset dataset = null ; if ( event . getDataset ( ) instanceof XYDataset ) { dataset = ( XYDataset ) event . getDataset ( ) ; } for ( XYPlot subplot : this . subplots ) { if ( subplot . indexOf ( dataset ) >= 0 ) { subplot . configureRangeAxes ( ) ; } } }
target:  Receives notification of a change to the plot's dataset. <P> The axis ranges are updated if necessary.