@Override
public <T> T unwrap(Class<T> clazz) {
  if(clazz == PlannerSettings.class){
    return (T) this;
  } else if(clazz == CalciteConnectionConfig.class){
    return (T) CONFIG;
  } if (clazz == SabotConfig.class) {
    return (T) sabotConfig;
  } else if (CancelFlag.class.isAssignableFrom(clazz)) {
    return clazz.cast(cancelFlag);
  }
  return null;
}
 

@SuppressWarnings("deprecation")
public void setCancelFlag(CancelFlag cancelFlag) {
  // ignored
}
 

@SuppressWarnings("deprecation")
public void setCancelFlag(CancelFlag cancelFlag) {
  // ignored
}
 

/**
 * Does nothing.
 *
 * @deprecated Previously, this method installed the cancellation-checking
 * flag for this planner, but is now deprecated. Now, you should add a
 * {@link CancelFlag} to the {@link Context} passed to the constructor.
 *
 * @param cancelFlag flag which the planner should periodically check
 */
@Deprecated // to be removed before 2.0
void setCancelFlag(CancelFlag cancelFlag);
 

/**
 * Does nothing.
 *
 * @deprecated Previously, this method installed the cancellation-checking
 * flag for this planner, but is now deprecated. Now, you should add a
 * {@link CancelFlag} to the {@link Context} passed to the constructor.
 *
 * @param cancelFlag flag which the planner should periodically check
 */
@Deprecated // to be removed before 2.0
void setCancelFlag(CancelFlag cancelFlag);