RowIndexWriter.new ByteSource() {...}

Element	Missed Instructions	Cov.	Missed Branches	Cov.	Missed	Cxty	Missed	Lines	Missed	Methods
Total	2 of 56	96%	1 of 6	83%	1	5	1	12	0	2
next()		93%		83%	1	4	1	9	0	1
{...}		100%		n/a	0	1	0	3	0	1