import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.linuxtools.tmf.core.TmfProjectNature;
import org.eclipse.linuxtools.tmf.ui.project.model.TmfTraceFolder;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.linuxtools.tmf.core.TmfProjectNature;
import org.eclipse.linuxtools.tmf.ui.project.model.TmfTraceFolder;