@FunctionalInterface public static interface Remote.DoubleSupplier extends DoubleSupplier, Serializable
double-valued results.  This is the
 double-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 DoubleSupplier.getAsDouble().
Remote.SuppliergetAsDouble