State that flows across segments (groups) — 'continuous' mode reads/accumulates through this A grouped table builds this once, then passes it into resolveSegmentBody for each group, in render order.
number of rows already resolved before this segment (the base for continuous rowNumber)
running total per column index (continuous runningTotal)
State that flows across segments (groups) — 'continuous' mode reads/accumulates through this A grouped table builds this once, then passes it into resolveSegmentBody for each group, in render order.