Advanced rows

Advanced displayed rows support two separate workflows: source-provided summary output and runtime-owned insertion drafts.

• Summary rows and footers covers rollups, opening and closing rows, subtotals, level footers, and parent-scoped child footers.
• Phantom rows and inserts covers unsaved insert rows, draft state, persistence, and failure handling.

Both workflows use the displayed-row model, but their ownership differs. Summary rows arrive in source snapshots. Phantom rows remain local to a GridLevelRuntime until the source creates an authoritative row.

Continue with the Grid reference.