package bookTrading.logging;

import jade.core.*;

public interface LoggingHelper extends ServiceHelper {
  public void setVerbose(boolean verbose);
}

==================================

...
private ServiceHelper helper = new LoggingHelperImpl();
...
public ServiceHelper getHelper(Agent a) {
  return helper;
}
...
public class LoggingHelperImpl implements LoggingHelper {
  public void init(Agent a) {
  }

  public void setVerbose(boolean v) {
    verbose = v;
  }
}
...