Gets the list of eras for the chronology.
!(p)
Most calendar systems have an era, within which the year has meaning.
If the calendar system does not support the concept of eras, an empty
list must be returned.
@return the list of eras for the chronology, may be immutable, not null
Gets the list of eras for the chronology. !(p) Most calendar systems have an era, within which the year has meaning. If the calendar system does not support the concept of eras, an empty list must be returned.
@return the list of eras for the chronology, may be immutable, not null