public boolean validate(LineState state){
  AugmentedNode<ILineSegment> s=state.root();
  if (s == null)   return true;
  return validateNode(s);
}

public boolean validate ( LineState state ) { AugmentedNode < ILineSegment > s = state . root ( ) ; if ( s == null ) return true ; return validateNode ( s ) ; }
debugging method to ensure that all min / max are properly set in the tree .
