activateHandler(IWorkbenchCommandConstants.EDIT_COPY,
new CopyHandler(tree.getDisplay(), settings, labelprovider, viewer));
activateHandler(IWorkbenchCommandConstants.FILE_REFRESH,
new RefreshSessionHandler(CoverageTools.getSessionManager()));
activateHandler(IWorkbenchCommandConstants.NAVIGATE_COLLAPSE_ALL,
new CollapseAllHandler(viewer));
activateHandler(LinkWithSelectionHandler.ID, new LinkWithSelectionHandler(
settings, selectiontracker));
}