https://github.com/jfree/jfreechart/releases/tag/v1.5.3
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Version 1.5.3 (21 February 2021)
- add new FlowPlot class for drawing Sankey charts;
- throw exception in DefaultPieDataset for invalid index (#212);
- fix isJFreeSVGAvailable() method (bug #207);
- replaced some usages of ObjectUtils with the JDK Objects class;
- remove unused URLUtilities class;
- removed @since 1.0.x Javadoc tags since these do not provide useful information anymore.