code: public void reset() {
          iZone = iDefaultZone;
          iOffset = null;
          iPivotYear = iDefaultPivotYear;
          iSavedFieldsCount = 0;
          iSavedFieldsShared = false;
          iSavedState = null;
      }
docs: Resets the state back to that when the object was constructed.
  <p>
  This resets the state of the bucket, allowing a single bucket to be re-used
  for many parses. The bucket must not be shared between threads.
  
  @since 2.4