private void visitFocus(NodeItem n,NodeItem c){
  if (n.getDOI() <= -1) {
    visit(n,c,0,0);
    if (m_threshold < 0)     visitDescendants(n,c);
    visitAncestors(n);
  }
}

private void visitFocus ( NodeItem n , NodeItem c ) { if ( n . getDOI ( ) <= - 1 ) { visit ( n , c , 0 , 0 ) ; if ( m_threshold < 0 ) visitDescendants ( n , c ) ; visitAncestors ( n ) ; } }
visit a focus node .
