fContextsViewer.setContentProvider(new ContextsContentProvider());
fContextsViewer.setLabelProvider(new ContextsLabelProvider());
fContextsViewer.addCheckStateListener(new ContextCheckListener());
fContextsViewer.setInput(fContextModel);
fContextsViewer.getTree().setLayoutData(new GridData(GridData.FILL_BOTH));
fContextsViewer.setContentProvider(new ContextsContentProvider());
fContextsViewer.setLabelProvider(new ContextsLabelProvider());
fContextsViewer.addCheckStateListener(new ContextCheckListener());
fContextsViewer.setInput(fContextModel);
fContextsViewer.getTree().setLayoutData(new GridData(GridData.FILL_BOTH));