Provides support for retrieving information on Commands from the workbench.
Most of org.eclipse.ui.commands.* is depracated in favour of org.eclipse.core.commands,
but the ICommandService and associated classes are used to access the workbench
view of org.eclipse.core.commands. getService(ICommandService.class)
can be used to get the ICommandService from the workbench, workbench window,
or part site.