/** Restricted constructor */
GJEraDateTimeField(BasicChronology chronology) {
super(DateTimeFieldType.era());
iChronology = chronology;
}
/**
* Get the era field for this chronology.
*
* @return DateTimeField or UnsupportedDateTimeField if unsupported
*/
public DateTimeField era() {
return UnsupportedDateTimeField.getInstance(DateTimeFieldType.era(), eras());
}