Figure 11‑5 contains the class hierarchy for ReportElementHandle in the org.eclipse.birt.report.model.api package and the classes that derive from it. The interfaces that the classes implement are all in the org.eclipse.birt.report
.model.elements.interfaces and org.eclipse.birt.report.model.elements packages. Classes with names that have a prefix of olap are in the org.eclipse.
birt.report.model.olap package.