import org.forester.phylogeny.iterators.PhylogenyNodeIterator;
import org.forester.util.ForesterUtil;
import org.forester.phylogeny.iterators.PhylogenyNodeIterator;
import org.forester.util.ForesterUtil;
for( final PhylogenyNodeIterator iter = _phy.iteratorPostorder(); iter.hasNext(); ) {
final PhylogenyNode node = iter.next();
if ( ( node.getNodeData().getSequences() != null ) && !node.getNodeData().getSequences().isEmpty() ) {
for( final PhylogenyNodeIterator iter = _phy.iteratorPostorder(); iter.hasNext(); ) {
final PhylogenyNode node = iter.next();
if ( ( node.getNodeData().getSequences() != null ) && !node.getNodeData().getSequences().isEmpty() ) {