AsyncEchoHandler.new FutureCallback() {...}

Element	Missed Instructions	Cov.	Missed Branches	Cov.	Missed	Cxty	Missed	Lines	Missed	Methods
Total	51 of 51	0%	0 of 0	n/a	4	4	12	12	4	4
completed(byte[])		0%		n/a	1	1	7	7	1	1
{...}		0%		n/a	1	1	1	1	1	1
failed(Exception)		0%		n/a	1	1	2	2	1	1
cancelled()		0%		n/a	1	1	2	2	1	1