@FunctionalInterface public static interface Remote.LongSupplier extends LongSupplier, Serializable
long-valued results.  This is the long-producing primitive specialization of Remote.Supplier.
 
There is no requirement that a distinct result be returned each time the supplier is invoked.
This is a functional interface
 whose functional method is LongSupplier.getAsLong().
Remote.SuppliergetAsLong