code: private String getEffectiveVisitorPackageName ()
    {
      if (this.packageName != null)
        return this.packageName.length () <= 0 ? VISITOR : this.packageName + '.' + VISITOR;
      if (this.visitorPackageName != null)
        return this.visitorPackageName;
      return VISITOR;
    }
docs: Gets the effective package name for the visitor files.
  
  @return The effective package name for the visitor files, never
  <code>null</code>.