default LongBiConsumer andThen(LongBiConsumer after) {
        Objects.requireNonNull(after);
        return (long a, long b) -> { accept(a, b); after.accept(a, b); };
    }
Returns a composed {@code LongBiConsumer} that performs, in sequence, 
this operation followed by the {@code after} operation. If performing 
either operation throws an exception, it is relayed to the caller of the
composed operation.  If performing this operation throws an exception,
the {@code after} operation will not be performed.

@param after  the operation to perform after this operation
@return       a composed {@code LongBiConsumer} that performs in sequence 
              this operation followed by the {@code after} operation

@throws NullPointerException  if {@code after} is null
common-parent/function/src/main/java/com/speedment/common/function/LongBiConsumer.java