import org.eclipse.e4.ui.di.Focus;
import org.eclipse.jface.viewers.ColumnLabelProvider;
import org.eclipse.jface.viewers.IStructuredContentProvider;
import org.eclipse.e4.ui.di.Focus;
import org.eclipse.jface.viewers.ColumnLabelProvider;
import org.eclipse.jface.viewers.IStructuredContentProvider;
viewer.setContentProvider(new CmsSessionContentProvider());
viewer.getTable().setHeaderVisible(true);
viewer.setContentProvider(new CmsSessionContentProvider());
viewer.getTable().setHeaderVisible(true);