https://download.eclipse.org/nattable/releases/2.4.0/apidocs/org/eclipse/nebula/widgets/nattable/summaryrow/package-tree.html
org.eclipse.nebula.widgets.nattable.summaryrow Class Hierarchy (Nebula NatTable 2.4.0-SNAPSHOT API)
tree: package: org.eclipse.nebula.widgets.nattable.summaryrow