Where a case sits in a list of disagreements, and the cases before and after it, for stepping through them one at a time. index is -1 (and previous null, next the first) when the case isn't in the list.
index
previous
next
The disagreements, in the order they're read.
The case being read now.
Where a case sits in a list of disagreements, and the cases before and after it, for stepping through them one at a time.
indexis -1 (andpreviousnull,nextthe first) when the case isn't in the list.