if ( phy.getNumberOfExternalNodes() < 2 ) {
ForesterUtil.fatalError( PRG_NAME,
"after removal of unresolvable external nodes, phylogeny has "
if ( phy.getNumberOfExternalNodes() < 2 ) {
ForesterUtil.fatalError( PRG_NAME,
"after removal of unresolvable external nodes, phylogeny has "