@FunctionalInterface public static interface Remote.LongBinaryOperator extends LongBinaryOperator, Serializable
long-valued operands and
 producing a long-valued result.   This is the primitive type
 specialization of BinaryOperator for long.
 
This is a functional interface
 whose functional method is LongBinaryOperator.applyAsLong(long, long).
BinaryOperator, 
Remote.LongUnaryOperatorapplyAsLong