Obtains an instance of {@code IsoEra} from an {@code int} value.
!(p)
{@code IsoEra} is an enum representing the ISO eras of BCE/CE.
This factory allows the enum to be obtained from the {@code int} value.
@param isoEra the BCE/CE value to represent, from 0 (BCE) to 1 (CE)
@return the era singleton, not null
@throws DateTimeException if the value is invalid
Obtains an instance of {@code IsoEra} from an {@code int} value. !(p) {@code IsoEra} is an enum representing the ISO eras of BCE/CE. This factory allows the enum to be obtained from the {@code int} value.
@param isoEra the BCE/CE value to represent, from 0 (BCE) to 1 (CE) @return the era singleton, not null @throws DateTimeException if the value is invalid