Function describeDelta

describeDelta(
    workbook: IWorkbook,
    commitId?: string,
    options?: DescribeDeltaOptions,
): Promise<RunDelta | null>
Describes what a commit did, read from the workbook after its calculation settled.
Parameters
- workbook: IWorkbook
  The workbook the commit landed on, settled.
- OptionalcommitId: string
  The commit. Omit for the current one.
- Optionaloptions: DescribeDeltaOptions
Returns Promise<RunDelta | null>
null when the commit changed no cells.

Remarks
Nothing here is collected on the write path. The written ranges come from the commit (IWorkbook.getChanges), what they replaced from the sheet as it was at the commit before (IWorksheet.ChangeEvent.getPreviousRanges), and everything else is a read of the settled workbook bounded by what was written.