80  * The field works using double dispatch. Client code calls methods on a date-time like

    80  * The field works using double dispatch. Client code calls methods on a date-time like

    81  * {@code LocalDateTime} which check if the field is a {@code ChronoField}.

    81  * {@code LocalDateTime} which check if the field is a {@code ChronoField}.

    82  * If it is, then the date-time must handle it.

    82  * If it is, then the date-time must handle it.

    83  * Otherwise, the method call is re-dispatched to the matching method in this interface.

    83  * Otherwise, the method call is re-dispatched to the matching method in this interface.

    84  *

    84  *

    86  * This interface must be implemented with care to ensure other classes operate correctly.

    86  * This interface must be implemented with care to ensure other classes operate correctly.

    87  * All implementations that can be instantiated must be final, immutable and thread-safe.

    87  * All implementations that can be instantiated must be final, immutable and thread-safe.

    88  * Implementations should be {@code Serializable} where possible.

    88  * Implementations should be {@code Serializable} where possible.

    89  * An enum is as effective implementation choice.

    89  * An enum is as effective implementation choice.

    90  *

    90  *