/**
  * @param m the risk method to use
  * @param toDefault if true, than the default value is returned
  * @return an array containing the limits (or null).
  */
 protected Number[] getLimits(final RiskMethod m, final boolean toDefault) {
   Number[] limits;
   if (m == PreferenceManager.getRiskMethod(owner, toDefault)) {
     limits = PreferenceManager.getLimits(owner, toDefault);
   } else {
     limits = new Number[] {0, 0};
   }
   return limits;
 }